Question 102307
To find the equation of a line, let's first find the slope of the line. 
To find the slope, find the change in y and then the change in x. 
Change in y : {{{y[2]-y[1]=-3-4=-7}}}
Change in x : {{{x[2]-x[1]=2-2=0}}}
Stop right there. You have a line where x never changes. The equation of that line is x=2. 
{{{drawing( 300, 300, -5, 5, -5, 5,grid( 1 ),circle( 2, -3, .2 ),circle( 2, 4, .2 ),green(line( 2, -5, 2, 5)))}}}