Answer
choice-B
Work Step by Step
Only choice-B is correct where $y$ can be written as a function of $x$. For other choices, each $x$ value corresponds to more that one $y$ values.
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 4 - Inverse, Exponential, and Logarithmic Functions - Summary Exercises on Functions: Domains and Defining Equations - Exercises - Page 487: 50
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