Answer
yes
Work Step by Step
Yes, the function $y=2^{x}$ is a function because it passes the horizontal line test. Even though the left side of the graph looks constant, the value of $y$ keeps decreasing ans the value of $x$ decreases.
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 9 - Section 9.3 - Exponential Functions - Vocabulary, Readiness & Video Check - Page 558: 4
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