Question 1056783
Start with this:
line n interacts line l at the point (-4, -9) and has a slope 3.


Your description creates difficulty in reading; just use some other symbol than anything that looks like a digit "ONE".  Call it line p instead.


Line n...., point  (-4,-9) and has slope 3.
Line n is {{{y+9=3(x+4)}}},
and becomes {{{y=3x+12-9}}}
{{{y=3x+3}}}------line n.


The description does not determine the equation for line p and does not determine for line m.