Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 2 - Functions and Their Graphs - 2.1 Functions - 2.1 Assess Your Understanding - Page 57: 36


The equation does not define $y$ as a function of $x$.

Work Step by Step

$y =± \sqrt{ 1− 2x}$ If $x =0 , y = =± 1$ . This equation is not a function, since a distinct x-value corresponds to two different y-values.
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