Answer
The relation is a function.
Work Step by Step
The domain is $\{2,4,6,8\}$
The range is $\{-7,7\}$
Each domain value is mapped to only one range value. The relation is a function.
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 8 - Polynomials and Factoring - 8-8 Factoring by Grouping - Practice and Problem-Solving Exercises - Page 533: 57
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