easy peasy
sub random points for x and solve for y
or solve for y and sum points for x and get y values
some easy points that work most of the time
sup
x=0
y=0
if x=0
0-4y=-18
4y=18
y=9/2
y=4.5
(0,4.5) is one point
if y=0
x-4(0)=-18
x=-18
(-18,0) is aonther
another is
(-5,2)
3 points are
(0,4.5)
(-18,0)
(-5,2)