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: 15

Answer

Only (d) depicts a function from $X$ to $Y$.

Work Step by Step

For an arrow diagram to depict a function, every value in the domain must have exactly one arrow coming from it and mapping it onto a value in the codomain.
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