Answer
$y=x$.
Work Step by Step
RECALL:
If the functions $f$ and $g$ are inverses of each other, then their graphs are mirror images of each other about the line $y=x$.
Thus, the missing expression in the given statement is $y=x$.
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 1 - Section 1.8 - Inverse Functions - Concept and Vocabulary Check - Page 269: 4
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