Question 118850
No points, three parallel lines
{{{ graph( 300, 300, -5, 5, -10, 10, x-2, x-3,x-4) }}}

One point, three non-parallel lines
{{{ graph( 300, 300, -5, 5, -10, 10, 6x+2, x+2,-3x+2) }}}


Two points, two parallel lines plus one non-parallel
{{{ graph( 300, 300, -5, 5, -10, 10, x-2, x-3,-3x) }}}

Three points,  three non-parallel lines
{{{ graph( 300, 300, -5, 5, -10, 10, -6x-2, 2x+5, -x+4) }}}