Answer
one-to-one
Work Step by Step
One of the condition that a function $y=f(x)$ having an inverse is that the function need to be "one-to-one". This means that for each $x$, there is only one corresponding $y$. Thus the answer is "one-to-one".
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 - 4.1 Inverse Functions - 4.1 Exercises - Page 406: 3
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