Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 7 - Algebra: Graphs, Functions, and Linear Systems - 7.2 Linear Functions and Their Graphs - Exercise Set 7.2 - Page 432: 71

Answer

An undefined slope means that the line is vertical.

Work Step by Step

RECALL: Slope is equal to the rise (change in y) over run (change in x). A line has an undefined slope if there is no change in the x-values. Points with the same x-coordinates belong to the same vertical line. Thus, an undefined slope means that the line is vertical.
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