16A: Yes, both lines Q and P are parallel against each other, and it’s quite easy when looking at the direction and distance between the two. If you need, you can also list the points out, Line Q has points (-1, 1) & (2, 5), and Line P has points (7.5, -1).
17A: Lines W and T are perpendicular, because of the cross/intersection they make between the distance.
