College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 3 - Review Exercises: 2

Answer

The relation does not represent a function.

Work Step by Step

RECALL: (1) A function is a relation if every element of the domain (first coordinate) is paired with exactly one element of the range (second coordinate). (2) The domain of a function is the set that contains all of the first coordinates. The range of a function is the set that contains all of the second coordinates. Note that the first coordinate $4$ is paired with two different second coordinates ($-1$ and $2$). Thus, the given relation is NOT a function.
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