Answer
$x=-3$.
Work Step by Step
If the line is vertical, then the equation must be $x=m$. $(-3,4)$ is on the line, hence $x=-3$.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 1 - Graphs - Chapter Review - Review Exercises - Page 42: 17
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