College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 2, Functions - Chapter 2 Test - Page 271: 1


(a) and (b) are functions (a) is one-to-one

Work Step by Step

To determine if a graph is a function, we use the vertical line test. Graphs (a) and (b) pass the vertical line test and are therefore functions. To determine if these functions are one-to-one, we use the horizontal line test. Graph (a) passes this test and is therefore one-to-one.
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