Answer
Not a function.
Work Step by Step
A relation is a function if for all $x$ values there is exactly one corresponding $y$ value.
Hence here, because for $x=3$, there are both $y=6$ and $y=8$, it is not a function.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 4 - Polynomial and Rational Functions - Chapter Review - Cumulative Review - Page 245: 7
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