Question

Write an equation of the vertical line through the point $(3,0)$

Answer 1

Here the point lie on $x-axis$ and equation of $x-axis$ is $y=0$

where SLope is Zero $m=0$

The slope of vertical line means perpendicular line to $x-axis$ is $m_1\times 0=-1$

$m_1=\infty$

The equation of line from $(3,0)$ and slope $m_1=\infty$

$y=\frac{1}{0}(x-3)$

$0=x-3$

$x=3$