Table of Contents

## What is a vertical asymptote hole?

Holes occur when factors from the numerator and the denominator cancel. When a factor in the denominator does not cancel, it produces a vertical asymptote. Both holes and vertical asymptotes restrict the domain of a rational function.

## What is a vertical asymptote in a rational function?

A vertical asymptote is a vertical line that guides the graph of the function but is not part of it. It can never be crossed by the graph because it occurs at the x-value that is not in the domain of the function. denominator then x = c is an equation of a vertical asymptote.

## What does the hole represent in a rational function?

The holes in a rational function are the result of it sharing common factors shared by the numerator and denominator. These are coordinates that the function passes through but are not part of the function’s domain and range.

## How do you tell if a vertical asymptote has a hole?

Set each factor in the denominator equal to zero and solve for the variable. If this factor does not appear in the numerator, then it is a vertical asymptote of the equation. If it does appear in the numerator, then it is a hole in the equation.

## What is the difference between horizontal and vertical asymptotes?

While vertical asymptotes describe the behavior of a graph as the output gets very large or very small, horizontal asymptotes help describe the behavior of a graph as the input gets very large or very small.

## What is the difference between the horizontal asymptote and vertical asymptote of a rational function?

Vertical asymptote is parallel to the y axis meaning that the x value never really becomes the value it is ‘tending’ to. Likewise horizontal asymptote is parallel to the x-axis meaning that the y value never really becomes the value it is ‘tending’ to.

## Can a rational function have more than one hole?

It is possible to have holes in the graph of a rational function. Before putting the rational function into lowest terms, factor the numerator and denominator.

## Is a vertical asymptote a discontinuity?

The difference between a “removable discontinuity” and a “vertical asymptote” is that we have a R. discontinuity if the term that makes the denominator of a rational function equal zero for x = a cancels out under the assumption that x is not equal to a. Othewise, if we can’t “cancel” it out, it’s a vertical asymptote.

## Which functions have a horizontal asymptote?

Certain functions, such as exponential functions, always have a horizontal asymptote. A function of the form f (x) = a (bx) + c always has a horizontal asymptote at y = c.

## What is the reason why asymptotes occur in rational functions?

When the numerator of a rational function has degree exactly one greater than the denominator , the function has an oblique (slant) asymptote. The asymptote is the polynomial term after dividing the numerator and denominator. This phenomenon occurs because when dividing the fraction, there will be a linear term, and a remainder.

## How do you find the horizontal asymptotes of a function?

To Find Horizontal Asymptotes: 1) Put equation or function in y= form. 2) Multiply out (expand) any factored polynomials in the numerator or denominator.

## What are the rules for finding vertical asymptotes?

To find a vertical asymptote, first write the function you wish to determine the asymptote of. Most likely, this function will be a rational function, where the variable x is included somewhere in the denominator. As a rule, when the denominator of a rational function approaches zero, it has a vertical asymptote.