Consider the line . Then:
L is (parallel/perpendicular/neither) to the plane
L is (parallel/perpendicular/neither) to the plane
L is (parallel/perpendicular/neither) to the plane
L is (parallel/perpendicular/neither) to the plane
For the third line, when I took the cross product, I ended up with 0.
For the fourth line, <6,8,2> is a scalar multiple of <3,4,1>, so I am assuming the fourth line is parallel?
Thank you in advance.