Question 433113
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b>
Hi
Line Parallel to y-axis (slope undefined) and passes through  (4, 44)
 x = 4 is the Eq of this line.
{{{drawing(300,300,   -6, 6, -6, 6,  blue(line(4,6,4,-6))  , grid(1),
graph( 300, 300, -6, 6, -6, 6))}}}