Answer
$x=4$
Work Step by Step
A vertical line takes the form $x=a$, where $a$ is the $x-$coordinate of a point on the line. Hence, the vertical line passing through the given point, $(
4,12
)$, has the equation
\begin{array}{l}
x=4
.\end{array}
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 3 - Introduction to Graphing - 3.7 Point-Slope Form and Equations of Lines - 3.7 Exercise Set - Page 219: 78
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