Discrete Mathematics with Applications 4th Edition

Published by Cengage Learning
ISBN 10: 0-49539-132-8
ISBN 13: 978-0-49539-132-6

Chapter 1 - Speaking Mathematically - Exercise Set 1.3: 8

Answer

a. See picture. b. No, none of the relations are functions.
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Work Step by Step

Recall that a function maps every value in the domain onto exactly one value in the codomain. None of the relations given satisfies this criterion.
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