Answer
See below.
Work Step by Step
A function $f$ has an inverse that is a function if there is no horizontal line that intersects the graph of $f$ more than once. Then a function is called one-to-one.
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 9 - Section 9.2 - Composite and Inverse Functions - Concept and Vocabulary Check - Page 686: 9
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