Chapter 3 - Introduction to Graphing - 3.7 Point-Slope Form and Equations of Lines - 3.7 Exercise Set: 78

$x=4$

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}

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