Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 2 - Mid-Chapter Check Point - Page 135: 5


Not a function. Domain: $\{-2,-1,0,1,2\}.$ Range: $\{-2,-1,1,3\}.$

Work Step by Step

The Vertical Line Test says that every vertical line drawn can only intersect the graph in at most one point for the graph to represent a function. Here this fails at $x=-1$, hence it is not a function. Domain: $\{-2,-1,0,1,2\}.$ Range: $\{-2,-1,1,3\}.$
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