Equation of vertical asymptote calculator

The vertical asymptote is a place where the function is undefined and the limit of the function does not exist. This is because as 1 approaches the asymptote, even small shifts in the x -value lead to arbitrarily large fluctuations in the value of the function. On the graph of a function f (x), a vertical asymptote occurs at a point P = (x0,y0 ...

Problem 1: Write a rational function f that has a vertical asymptote at x = 2, a horizontal asymptote y = 3 and a zero at x = - 5. Solution to Problem 1: Since f has a vertical is at x = 2, then the denominator of the rational function contains the term (x - 2). Function f has the form. f(x) = g(x) / (x - 2) g(x) which is in the numerator must be of the same degree as the denominator since f ...Question: Give the equations of any vertical or horizontal asymptotes for the graph of the rational function.f left parenthesis x right parenthesis equals StartFraction 6 minus 3 x Over 3 x plus 2 EndFractionQuestion content area bottomPart 1Select the correct choice below and fill in any answer boxes within your choice.A.The equation of the vertical asymptote isTo get a visual on this topic, I would plug the equation y=1/x into a graphing calculator. The asymptotes that you will see are x=0, (the line soars up to infinity on one side, and down to negative infinity on the other), and y=0, (as x goes to infinity, the line gets closer and closer to the x-axis, but it never touches).Examples of Writing the Equation of a Rational Function Given its Graph 1. Vertical asymptote x = ‒3, and horizontal asymptote y = 0. The graph has no x-intercept, and passes through the point (‒2,3) a. ( ) 2. Vertical asymptote x = 4, and horizontal asymptote y = ‒2. The graph also has an x-intercept of 1, and passes through the point ...asymptotes\:y=\frac{x^2+x+1}{x} asymptotes\:f(x)=x^3 ; asymptotes\:f(x)=\ln (x-5) asymptotes\:f(x)=\frac{1}{x^2} asymptotes\:y=\frac{x}{x^2-6x+8} asymptotes\:f(x)=\sqrt{x+3} Show More To get a visual on this topic, I would plug the equation y=1/x into a graphing calculator. The asymptotes that you will see are x=0, (the line soars up to infinity on one side, and down to negative infinity on the other), and y=0, (as x goes to infinity, the line gets closer and closer to the x-axis, but it never touches). Like the previous example, this denominator has no zeroes, so there are no vertical asymptotes. Unlike the previous example, this function has degree-2 polynomials top and bottom; in particular, the degrees are the same in the numerator and the denominator.Since the degrees are the same, the numerator and denominator "pull" evenly; this graph should not drag down to the x-axis, nor should it ...3:30. , as q (x) approaches the vertical asymptote of -3, the function goes down and approaches negative infinity. Try substituting any value less than -3 for x, and you'll find the function always comes out as a negative. If we look at x = -4, for example, the numerator simplifies to (-3) (-2) = 6. The denominator simplifies to -4+3 = -1.

It can handle horizontal and vertical normal lines as well. The normal line is perpendicular to the tangent line. ... Asymptote Calculator. The calculator will try to find the vertical, horizontal, and slant asymptotes of the function, with steps shown. ... The calculator will find the equation of the secant line that intersects the given curve ...Asymptote. of a curve $ y = f (x) $ with an infinite branch. A straight line the distance of which from the point $ (x, f (x)) $ on the curve tends to zero as the point moves along the branch of the curve to infinity. An asymptote can be vertical or inclined. The equation of a vertical asymptote is $ x = a $, where $ f (x) \rightarrow + \infty ...An asymptote is a line that the graph of a function approaches but never touches. The ... 👉 Learn how to find the vertical/horizontal asymptotes of a function.Equations Inequalities Scientific Calculator Scientific Notation Arithmetics Complex Numbers Polar/Cartesian Simultaneous Equations System of Inequalities Polynomials Rationales Functions Arithmetic & Comp. Coordinate Geometry Plane Geometry Solid Geometry Conic Sections TrigonometryFind the Asymptotes f (x) = log of x-4. f (x) = log(x − 4) f ( x) = log ( x - 4) Set the argument of the logarithm equal to zero. x−4 = 0 x - 4 = 0. Add 4 4 to both sides of the equation. x = 4 x = 4. The vertical asymptote occurs at x = 4 x = 4. Vertical Asymptote: x = 4 x = 4. Free math problem solver answers your algebra, geometry ...Free functions asymptotes calculator - find functions vertical and horizonatal asymptotes step-by-step We've updated our ... Equations Inequalities System of Equations System of Inequalities Basic Operations Algebraic Properties Partial Fractions Polynomials Rational Expressions ... function-asymptotes-calculator. asymptotes f(x)=log_{2}(x+5 ...

What is a Vertical Asymptote? Primarily, there are two different types of asymptotes: horizontal and vertical. In this guide, we'll be focusing on vertical asymptotes. Make sure to go check out the guide on horizontal asymptotes after you read this one! A vertical asymptote, like the name suggests, is vertical.A vertical asymptote represents a value at which a rational function is undefined, so that value is not in the domain of the function. A reciprocal function (a special case of a rational function) cannot have values in its domain that cause the denominator to equal zero. In general, to find the domain of a rational function, we need to determine which inputs would cause division by zero.An oblique or slant asymptote is a dashed line on a graph, describing the end behavior of a function approaching a diagonal line where the slope is neither zero nor undefined. Thus, when either lim x → ∞ f ( x) or lim x → − ∞ f ( x) give the equation of a line mx + b, where m ≠ 0, then we say that the function f (x) has an oblique ...Find the vertical asymptote (s) of each function. Solutions: (a) First factor and cancel. Since the factor x - 5 canceled, it does not contribute to the final answer. Only x + 5 is left on the bottom, which means that there is a single VA at x = -5. (b) This time there are no cancellations after factoring.To find the vertical asymptote (s) of a rational function, simply set the denominator equal to 0 and solve for x. Examples: Find the vertical asymptote (s) We mus set the denominator equal to 0 and solve: x + 5 = 0. x = -5. There is a vertical asymptote at x = -5. We mus set the denominator equal to 0 and solve: This quadratic can most easily ...

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If the degree of the numerator is equal to the degree of the denominator, the horizontal asymptote is equal to the ratio of the leading coefficients. f(x) = 6x4 − 3x3 + 12x2 − 9 3x4 + 144x − 0.001. Notice how the degree of both the numerator and the denominator is 4. This means that the horizontal asymptote is y = 6 3 = 2.Precalculus. Find the Asymptotes y=e^x. y = ex y = e x. Exponential functions have a horizontal asymptote. The equation of the horizontal asymptote is y = 0 y = 0. Horizontal Asymptote: y = 0 y = 0. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations ...An asymptote can be either vertical or non-vertical (oblique or horizontal). In the first case its equation is x = c, for some real number c. The non-vertical case has equation y = mx + n, where m and are real numbers. All three types of asymptotes can be present at the same time in specific examples.Free functions asymptotes calculator - find functions vertical and horizonatal asymptotes step-by-stepFind the equations of any vertical asymptotes. f (x)= (x2−9)(x2−1)x2+3 Select the correct choice below and fill in any answer boxes to complete your choice. A. There is one vertical asymptote. Its equation is B. There are two vertical asymptotes. In order from left to right, their equations are and C. There are three vertical asymptotes.Precalculus. Find the Asymptotes y=e^x. y = ex y = e x. Exponential functions have a horizontal asymptote. The equation of the horizontal asymptote is y = 0 y = 0. Horizontal Asymptote: y = 0 y = 0. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations ...

Question: Graph the function. Give the equations of the vertical and horizontal asymptotos. 4x-1 f (x) CE Give the equation of any vertical asymptotes for the graph of the rational function. Select the correct choice below and fill in any answer boxes within your choice. OAX (Simplily your answer. Une a comma to separato answers as needed) OB.Equations Inequalities Scientific Calculator Scientific Notation Arithmetics Complex Numbers Polar/Cartesian Simultaneous Equations System of Inequalities Polynomials Rationales Functions Arithmetic & Comp. Coordinate Geometry Plane Geometry Solid Geometry Conic Sections Trigonometry. ... find vertical asymptote. en. Related …Asymptotes Calculator. Function f(x)= f ( x) = Variable. Search for horizontal asymptote to plus infinity (x→+∞ x → + ∞) Search for horizontal asymptote to minus infinity (x →−∞ x …Asymptotes. An asymptote is, essentially, a line that a graph approaches, but does not intersect. For example, in the following graph of y = 1 x y = 1 x, the line approaches the x-axis (y=0), but never touches it. No matter how far we go into infinity, the line will not actually reach y=0, but will always get closer and closer.• No calculator! 1. 1. (14 pts) Calculate the following limits. ... The equation of a function that has a horizontal asymptote y = 7, vertical asymptotes at x = 1 and x = 5, …Identify the horizontal and vertical asymptotes of the graph, if any. Solution. Shifting the graph left 2 and up 3 would result in the function. f(x) = 1 x + 2 + 3. or equivalently, by giving the terms a common denominator, f(x) = 3x + 7 x + 2. The graph of the shifted function is displayed in Figure Page4.3.7.Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more. Finding Asymptotes of Rational Functions | DesmosTranscribed Image Text: Determine the vertical asymptotes of the following functions without using a graphing calculator. Enter your answers as a comma-separated list if necessary. a. Given that f (x) : 1 the vertical asymptote (s) of f is: 5 Preview x + 5 b. Given that g (x) the vertical asymptote (s) of g is: 6. x2 + x Preview. This is a ...In today’s digital age, technology has revolutionized the way we learn and solve complex problems, particularly in the field of mathematics. Gone are the days when students relied ...Free function discontinuity calculator - find whether a function is discontinuous step-by-step

3 Nov 2011 ... ... asymptote of a rational ... Determine the vertical and oblique asymptotes ... How to find domain and range of a rational equation using inverse.

Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more. Finding Asymptotes of Rational Functions | Desmos Homework: Homework 6 - Part II Question 2, 6.4.1 Plan 01 0 HW Score: 0/18 Points: 0/2 The given equation is an exponential function. Sketch the graph by hand, labeling three points on the graph. Also, state the domain, the range, whether it increases or decreases on its domain, and the equation of its vertical asymptote. Do not use a calculator.Action. 1. Factor q ( x) completely. 2. Set each factor equal to zero to find possible asymptotes. 3. Check for common factors with p ( x) to identify holes. Remember, a vertical asymptote is a line where the function approaches infinity or negative infinity as x approaches the asymptote from the left or right.Feb 13, 2022 · Your job is to be able to identify vertical asymptotes from a function and describe each asymptote using the equation of a vertical line. Take the following rational function: \(f(x)=\frac{(2 x-3)(x+1)(x-2)}{(x+2)(x+1)}\) To identify the holes and the equations of the vertical asymptotes, first decide what factors cancel out. If our function is the ratio of a polynomial and a polynomial , then the only candidates for vertical asymptotes are the values of where .However, the fact that is not enough to guarantee that the line is a vertical asymptote of ; we also need to evaluate .If and , then the line is a vertical asymptote of .If and , then the line may or may not be a vertical asymptote.3:30. , as q (x) approaches the vertical asymptote of -3, the function goes down and approaches negative infinity. Try substituting any value less than -3 for x, and you'll find the function always comes out as a negative. If we look at x = -4, for example, the numerator simplifies to (-3) (-2) = 6. The denominator simplifies to -4+3 = -1.Step 1: Simplify the rational function. i.e., Factor the numerator and denominator of the rational function and cancel the common factors. Step 2: Set the denominator of the simplified rational function to zero and solve. Here is an example to find the vertical asymptotes of a rational function.An asymptote is a line that does not touch or intersect the function, but gets arbitrarily close to it. ... this vertical asymptote, it looks like as we get closer and closer to negative three that the value of the function at that point is approaching, is getting closer and closer to infinity, at least that's what it looks like from what we ...Graph the following equation, then give the domain, range, and vertical asymptote (as an equation). y = log: ( log: (3 - 2) + 4 Clear All Draw: A Domain: Range: Asymptote: > Next Question ; This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts.To find vertical asymptotes, you need to follow these steps: Determine the function's domain: The domain of a function specifies the set of values for which the function is defined. Vertical asymptotes occur at points where the function is not defined. Find the critical points: These are the points where the function is undefined or discontinuous.

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The vertical asymptote is a place where the function is undefined and the limit of the function does not exist. This is because as 1 approaches the asymptote, even small shifts in the x -value lead to arbitrarily large fluctuations in the value of the function. On the graph of a function f (x), a vertical asymptote occurs at a point P = (x0,y0 ...An asymptote can be vertical, horizontal, or on any angle. The asymptote represents values that are not solutions to the equation, but could be a limit of solutions. For example, consider the equation =. If you begin at the value x=3 and count down to select some solutions for this equation, you will get solutions of (3, 1/3), (2, 1/2), and (1,1).Calculus questions and answers. Find the equations of any vertical asymptotes. f (x)= x²+8 (x² - g) (x²-4) Select the correct choice below and fill in any answer boxes to complete your choice. O A. There is one vertical asymptote. Its equation is OB. There are two vertical asymptotes. In order from left to right, their equations are and ...Learn how to find removable discontinuities, horizontal asymptotes, and vertical asymptotes of rational functions. This video explores the specific example f (x)= (3x^2-18x-81)/ (6x^2-54) before generalizing findings to all rational functions. Don't forget that not every zero of the denominator is a vertical asymptote!This video explains how to determine the x-intercepts, y-intercepts, vertical asymptotes, and horizontal asymptote of a rational function.Site: http://mathis...Method 2: For rational functions, vertical asymptotes are vertical lines that correspond to the zeroes points of the denominator. Given rational function, f (x) Write f (x) in reduced form. f (x) - c is a factor in the denominator then x = c is the vertical asymptote. Vertical Asymptote formula. Euclidean Plane formulas list online.f (x) = x + 7 − 4 x 2 − 29 x − 5 The equation of the vertical asymptote is x = The equation of the slant asymptote is y = Get more help from Chegg Solve it with our Pre-calculus problem solver and calculator.Find an equation (in factored form) of a rational function, f, that satisfies the following conditions:vertical asymptote of x=4, x-intercept of (-3,0), hole... ….

Free functions calculator - explore function domain, range, intercepts, extreme points and asymptotes step-by-stepOblique Asymptote Calculator. Oblique Asymptote or Slant Asymptote happens when the polynomial in the numerator is of higher degree than the polynomial in the denominator. It is a slanted line that the function approaches as the x approaches infinity or minus infinity. A function can have at most two oblique asymptotes, and some kind of ...Step 1: Simplify the rational function. i.e., Factor the numerator and denominator of the rational function and cancel the common factors. Step 2: Set the denominator of the simplified rational function to zero and solve. Here is an example to find the vertical asymptotes of a rational function.Therefore, we need to look for values of x where the denominator is equal to zero. The denominator of the fraction in this case is 100-x and solving 100 - x = 0, we get that x = 100. The function becomes undefined at x=100 and that's the equation for the vertical asymptote. Upvote • 0 Downvote. Add comment. Report.Free Hyperbola calculator - Calculate Hyperbola center, axis, foci, vertices, eccentricity and asymptotes step-by-stepVertical asymptotes, or VA, are dashed vertical lines on a graph corresponding to the zeroes of a function y = f (x) denominator. Thus, the curve approaches but never crosses the vertical asymptote, as that would imply division by zero. We get the VA of the function as x = c when x approaches a constant value c going from left to right, and the ...Free Hyperbola Asymptotes calculator - Calculate hyperbola asymptotes given equation step-by-stepJoshua Clingman. 4 years ago. "When the degree of the numerator of a rational function is less than the degree of the denominator, the x-axis, or y=0, is the horizontal asymptote. When the degree of the numerator of a rational function is greater than the degree of the denominator, there is no horizontal asymptote."What is a vertical asymptote? Vertical asymptotes are vertical lines which correspond to the zeroes of the denominator of a rational function. The graph of the rational function will never cross or even touch the vertical asymptote (s), since this would cause division by zero. Equation of vertical asymptote calculator, Asymptote is a straight line that is closely approached by a plane curve so that the perpendicular distance between them decreases to zero as the distance from the origin increases to infinity. Finding function's asymptotes is one of the main steps in function analysis algorithm. There are three types of asymptotes: horizontal, vertical and ..., Note the behavior of the vertical asymptote. Was this change expected? 2. Now let's take a look at the slant asymptote. How could we have known this function would have a slant asy? 3. Find it for m=1 and m=2 by hand. 4. Play around with the parameter m again using the slider., Free Hyperbola Asymptotes calculator - Calculate hyperbola asymptotes given equation step-by-step, We say that x = k is a VA for a function f (x) if either the left-hand or right-hand limit to x = k is infinite: Finding Vertical Asymptotes. There are two main ways to …, A. Give the equation of each vertical asymptote, and give the corresponding factor that will appear in the rational function. vertical asymptote factor (x-1) X=-. > (x+1) x=1 Should these factors appear in the numerator or denominator of function? Denominator B. Give each x-intercept of the function, tell whether the graph crosses or touches ..., Calculate the limit of a function as \(x\) increases or decreases without bound. Recognize a horizontal asymptote on the graph of a function. Estimate the end behavior of a function as \(x\) increases or decreases without bound. Recognize an oblique asymptote on the graph of a function. Analyze a function and its derivatives to draw its graph., An asymptote can be vertical, horizontal, or on any angle. The asymptote represents values that are not solutions to the equation, but could be a limit of solutions. For example, consider the equation =. If you begin at the value x=3 and count down to select some solutions for this equation, you will get solutions of (3, 1/3), (2, 1/2), and (1,1)., What are vertical asymptotes? Vertical asymptotes are important boundary lines for a function, because, if you can find them, they're a line that the graph cannot cross, which can really help you sketch a more accurate picture of the curve. Vertical asymptotes are usually found in rational and logarithmic functions, but they can be found in ..., The denominator of a rational function can't tell you about the horizontal asymptote, but it CAN tell you about possible vertical asymptotes. What Sal is saying is that the factored denominator (x-3) (x+2) tells us that either one of these would force the denominator to become zero -- if x = +3 or x = -2. If the denominator becomes zero then ..., For the vertical asymptote at x = 2, x = 2, the factor was not squared, so the graph will have opposite behavior on either side of the asymptote. See Figure 21 . After passing through the x -intercepts, the graph will then level off toward an output of zero, as indicated by the horizontal asymptote., Asymptotes. An asymptote is, essentially, a line that a graph approaches, but does not intersect. For example, in the following graph of y = 1 x y = 1 x, the line approaches the x-axis (y=0), but never touches it. No matter how far we go into infinity, the line will not actually reach y=0, but will always get closer and closer., 5. Rewrite the function equation in replacing A, B, and C with the values that were found. Example1: Find the equation of the function for the graph below passing through (2,0), (1,2). Solution: The general equation is = 𝒍𝒐𝒈( + ) + 1. The graph shows a vertical asymptote at x = 3. Therefore, B is, The maximum height of a projectile is calculated with the equation h = vy^2/2g, where g is the gravitational acceleration on Earth, 9.81 meters per second, h is the maximum height ..., Solution: Degree of numerator = 1. Degree of denominator = 2. Since the degree of the numerator is smaller than that of the denominator, the horizontal asymptote is given by: y = 0. Problem 6. Find the horizontal and vertical asymptotes of the function: f (x) = x+1/3x-2. Solution: Horizontal Asymptote:, Free Ellipse calculator - Calculate ellipse area, center, radius, foci, vertice and eccentricity step-by-step, The graph of f has a vertical asymptote with equation x = −2. The function f(x) = 1/(x + 2) has a restriction at x = −2 and the graph of f exhibits a vertical asymptote having equation x = −2. It is important to note that although the restricted value x = −2 makes the denominator of f(x) = 1/(x + 2) equal to zero, it does not make the ..., An asymptote is a line that does not touch or intersect the function, but gets arbitrarily close to it. ... this vertical asymptote, it looks like as we get closer and closer to negative three that the value of the function at that point is approaching, is getting closer and closer to infinity, at least that's what it looks like from what we ..., Solution. There is a vertical asymptote at x=2. As x gets infinitely small there is a horizontal asymptote at y=−1. As x gets infinitely large, there is a horizontal asymptote at y=1. Example 4. Identify the horizontal and vertical asymptotes of the following piecewise function: f(x) = {ex − 1 sin x x ≤ 0 0 < x f ( x) = { e x − 1 x ≤ ..., Find the equations of any vertical asymptotes for the function below. f (x)= x2+x−6x2−2x−15 Determine the equation of any vertical asymptotes. Select the correct choice below and, if necessary, fill in the answer box within your choice. A. The vertical asymptote (s) is/are x= (Simplify your answer. Use a comma to separate answers as needed.), Result. A logarithmic function will have a vertical asymptote precisely where its argument (i.e., the quantity inside the parentheses) is equal to zero. Example 4. Find the vertical asymptote of the graph of f(x) = ln(2x+ 8). Solution. Since f is a logarithmic function, its graph will have a vertical asymptote where its argument, 2x+ 8, is ..., Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more. Loading... Explore math with our beautiful, free online graphing calculator. ... VERTICAL ASYMPTOTE(S) 4. When x = 0, f(x) is undefined. Therefore, x = 0 is a vertical asymptote., Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more. Hyperbola with Asymptotes. Save Copy. Log InorSign Up. x − h 2 a 2 − y − k 2 b 2 = 1. 1. − x − h 2 a ..., 3:30. , as q (x) approaches the vertical asymptote of -3, the function goes down and approaches negative infinity. Try substituting any value less than -3 for x, and you'll find the function always comes out as a negative. If we look at x = -4, for example, the numerator simplifies to (-3) (-2) = 6. The denominator simplifies to -4+3 = -1., Question: Find the equations of any vertical asymptotes. f(x) = " x2 +2 (x2-1) (x2-64) Find the vertical asymptote(s). Select the correct choice below and, if necessary, fill in the answer box(es) to complete your choice. O A. The function has one vertical asymptote, (Type an equation.) - and OB. The function has two vertical asymptotes., 1) The location of any vertical asymptotes. 2) The location of any x-axis intercepts. Here what the above function looks like in factored form: y = x +2 x +3 y = x + 2 x + 3. Once the original function has been factored, the denominator roots will equal our vertical asymptotes and the numerator roots will equal our x-axis intercepts. This means ..., Free Hyperbola calculator - Calculate Hyperbola center, axis, foci, vertices, eccentricity and asymptotes step-by-step , Free Hyperbola calculator - Calculate Hyperbola center, axis, foci, vertices, eccentricity and asymptotes step-by-step, Free equations calculator - solve linear, quadratic, polynomial, radical, exponential and logarithmic equations with all the steps. Type in any equation to get the solution, steps and graph, To find the vertical asymptotes, set the denominator equal to zero and solve for x. (x − 3)(x − 1) = 0. This is already factored, so set each factor to zero and solve. x − 3 = 0 or x − 1 = 0. x = 3 or x = 1. Since the asymptotes are lines, they are written as equations of lines. The vertical asymptotes are x = 3 and x = 1., Please help me find: equation(s) of vertical asymptote(s) equation(s) of horizontal asymptote(s) where f is decreasing where f is increasing x-coordinate(s) of local minima of f ,x-coordinate(s) of local maxima of f, where f is concave down where f is concave up x-coordinate(s) of inflection point(s) of f, To convert a parabola from vertex to standard form: Write down the parabola equation in the vertex form: y = a(x-h)² + k. Expand the expression in the bracket: y = a(x² - 2hx + h²) + k. Multiply the terms in the parenthesis by a: y = ax² - 2ahx + ah² + k. Compare the outcome with the standard form of a parabola: y = ax² + bx + c., Consequently, when the graphing calculator crosses a vertical asymptote where there is a shift from one type of infinity to another (e.g., from positive to negative), the calculator draws a “false line” of connection, one that it should not draw. ... Load the equation into your calculator, as shown in Figure \(\PageIndex{10}\)(a). Set the ..., This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Question: Which of the following equations could be an equation of a vertical asymptote of x2-9? y = x²+9 Select one: O a. x = -3 O b. x = 1 O c. x = 3 O d. There is no vertical asymptote. Here's the best way to solve it.