Question

Write the equation of a line passing through 4 on the x-axis and parallel to a y-axis .

Answer 1

Point $=(4,0)$

Parallel to $y$ axis

Slope$\infty$

$y-0=\infty (x-4)$

$⟹y-0=\frac{1}{0}(x-4)$

$⟹x-4=0$

Hence $x=4$ is equation of the line.