Question 627944
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
vertical line thru (-7,-10) is x = -7
{{{drawing(300,300,   -8, 6, -12, 6,  blue(line(-7,6,-7,-12))  , grid(1),
circle(-7, -10,0.3),

graph( 300, 300, -8, 6, -12, 6))}}}