Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Appendix A - Section A.1 - Introduction to Functions - A.1 Problem Set - Page 486: 5

Answer

vertical line

Work Step by Step

As function is a set of ordered pairs in which no two different ordered pairs have the same first coordinate, any vertical line (first coordinate is same) that crosses a graph of a relation in more than one location cannot be a function. So, vertical line can be used as test to determine if a graph is the graph of a function or not.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.