Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 1 - Section 1.2 - Basics of Functions and Their Graphs - Exercise Set: 60

Answer

$y$ is not a function of $x$

Work Step by Step

RECALL: If all vertical lines will pass through the graph in at most one point, then the graph represents $y$ as a function of $x$. Otherwise, the graph does not represent $y$ as a function of $x$. Notice that a number of vertical lines (such as x=0) will pass through the graph at two points. The graph fails the vertical line test. Thus, the given graph does not represent $y$ as a function of $x$.
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