Question 58634
x=3 is a special case.  If you ever have x=k , k is a real number and there's no y you have a vertical line going through k.  In this case you would have a line going straight up and down through x=3.
I can't graph vertical lines using this program because vertical lines aren't functions.  
{{{graph(300,200,-10,10,-10,10,0)}}}
Draw a vertical line through x=3.
Happy Calculating!!!