Asked by Nenny

Can you explain why the line x = 4 is a vertical line.
Answered by DrBob222
If x = 4, y = 0, 1, 2, 3, 4, 5, -1, -2, -3, -4 etc. Graph that line and you will see it is a vertical line going through all of those points and crossing the x axis at (4,0).