Calculus, 10th Edition (Anton)

Published by Wiley
ISBN 10: 0-47064-772-8
ISBN 13: 978-0-47064-772-1

Chapter 1 - Limits and Continuity - 1.3 Limits At Infinity; End Behavior Of A Function - Exercises Set 1.3 - Page 79: 36

Answer

False.

Work Step by Step

Take as an example $\frac{1}{x}$, $y=0$ is a horizontal asymptote: $\lim\limits_{x \to \infty} 1/x=0$ Here $p(x)=1$ and $q(x)=x$, therefore they don't have the same degree and yet have a horizontal asymptote.
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