What determines the existence of a horizontal asymptote?
When you have a rational function with the degree of the numerator less than or equal to the denominator. ...
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)