Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 3 - Cumulative Review - Page 282: 28



Work Step by Step

$x=-10$ is a vertical line on a graph. All points have the same x-coordinate. So the change in x-coordinate is $0$, making the slope value to have a denominator of $0$, which makes the slope undefined.
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