Answer
$x=2$
Work Step by Step
The equation of a vertical line takes the form $x=a$ where $a$ is the $x-$intercept. Hence, the equation of the line passing through $(
2,7
)$ with an undefined slope is $
x=2
.$
College Algebra (11th Edition)
by Lial, Margaret L.; Hornsby John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671791
ISBN 13:
978-0-32167-179-0
Chapter 2 - Section 2.5 - Equations of Lines and Linear Models - 2.5 Exercises - Page 226: 18
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