# What determines the existence of a horizontal asymptote?

##### 1 Answer

Apr 27, 2018

When you have a rational function with the degree of the numerator less than or equal to the denominator. ...

#### Explanation:

Given: How do you know a function has a horizontal asymptote?

There are a number of situations that cause horizontal asymptotes. Here are a couple:

A. When you have a rational function

B. When you have an exponential function

C. Some of the hyperbolic functions (part of Calculus)