Question 252509
Simply draw a straight vertical line at {{{x=8}}} to graph the equation {{{x=8}}} like so:


{{{ drawing(500, 500, -10, 10, -10, 10,
 graph( 500, 500, -10, 10, -10, 10,0),
 green(line(8,-20,8,20))

)}}}

Graph of {{{x=8}}} (green vertical line)