Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 2 - Graphs and Functions - 2.3 Functions - 2.3 Exercises - Page 215: 19


The given relation does not define a function.

Work Step by Step

RECALL: A function is a relation whose every first coordinate is paired with only one second coordinate. In the given relation, some first coordinates ($1$ and $2$) are paired with two second coordinates. Thus, the given relation does not define a function.
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