Question

Which equation below represents a vertical line? y = x + 0, y = x – 0, y = 4, x = 4

Answer 1

A vertical line is represented by x = a number
so ur vertical line is : x = 4 <==

** and just so u know, a horizontal line is represented by y = a number.

Answer 2

$x=4$ is the answer
hope this has helped you