Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 4 - An Introduction to Functions - 4-6 Formalizing Relations and Functions - Practice and Problem-Solving Exercises - Page 272: 31


The relation is a function.

Work Step by Step

The relation {(a, b), (b, a), (c, c), (e,d)} is a function. to solve this we can suppose that a=1, b=2. c=3 , d=4 and e=5. Using these values for the variables, the set becomes {(1, 2), (2, 1), (3, 3), (5,4). This shows that the following relations is a function because for each x value there is only one y-cordinate value. Thus the relation passes the vertical line test as there are no two y values for one x values and therefore the relation is a function.
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