First of all thanks for responding, what I'm still sort of confused about is if I plugged those parameters into their respective equations i.e.
[x,y,z] = [4,8,-1] + -1[2,3,-4] = [2, 5, 3] for line 1
[x,y,z] = [7,2,-1] + 1[-6,1,2] = [1, 3, 1] for line 2
would that mean that those aren't the...