Question 856986
<pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
 Equation of vertical lines through(-6,9) is  x = -6  (Blue Line)
{{{drawing(300,300,   -10,10,-10,10,  blue(line(-6,10,-6,-10))  
 grid(1),
circle(-6, 9,0.4),
graph( 300, 300, -10,10,-10,10))}}}