Answer
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Work Step by Step
$x=5$ is a vertical line. The slope of a line is defined as the change in y divided by the change in x:
$$m=\frac{\Delta y}{\Delta x}$$
Since $\Delta x=0$ for all vertical lines, the slope $m$ is undefined.
Calculus with Applications (10th Edition)
by Lial, Margaret L.; Greenwell, Raymond N.; Ritchey, Nathan P.
Published by
Pearson
ISBN 10:
0321749006
ISBN 13:
978-0-32174-900-0
Chapter 1 - Linear Functions - 1.1 Slopes and Equations of Lines - 1.1 Exercises - Page 13: 9
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