Question 55052
Any time the solution to a line is one number such as this, the line is either a vertical or a horizontal line.
x = vertical.  y = horizontal
So this is a vertical line going through the -2 on the x-axis
{{{ drawing( 300, 300, -5, 5, -5, 5,
  grid( 1 ),
  green (line( -2, -5, -2, 5 ))
)
 }}}