Question 655312
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
Yes! y = 5 ia an horizontal line
Line perpendicular to that would need to be a vertical Line.
Vertical line passing thru (-2,2) would be x = -2
{{{drawing(300,300,   -6, 6, -6, 6,  blue(line(-2,6,-2,-6))  , grid(1),
graph( 300, 300, -6, 6, -6, 6,0,5))}}}