Does this table represent a function? why or why not 2,1 3,4 4,4 5,2 5,5

Liam's parents are driving three times as fast as liam is biking, but they left later than he did. if his parents caught up with him two hours after he left, how much later than liam did they leave?

If you are just building your payment history, how many points from a perfect score will you possibly miss?

Can someone tell me if this is perpendicular? !