Find the constant of inverse variation when x = 3 and y = -12​

Can someone me with this problem i don't understand i need

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

Madeline takes her family on a boat ride. going through york canal, she drives 6 miles in 10 minutes. later on as she crosses stover lake, she drives 30 minutes at the same average speed. which statement about the distances is true?