College Algebra (11th Edition)

Published by Pearson
ISBN 10: 0321671791
ISBN 13: 978-0-32167-179-0

Chapter 4 - Review Exercises - Page 468: 7

Answer

The function is not one-to-one.

Work Step by Step

A one to one function is a function in which each x-value corresponds to one y-value and each y-value corresponds to one x-value. In the given function, a y-value may correspond to more than one x-value. For instance, y is $\sqrt5$ for both $x=-1$ and $x=1$. Therefore the function is not one to one.
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