Somebody please help me with math on my profile!!

How can you tell when x and y are not directly proportional?

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?

James is playing his favorite game at the arcade. after playing the game 33 times, he has 88 tokens remaining. he initially had 2020 tokens, and the game costs the same number of tokens each time. the number tt of tokens james has is a function of gg, the number of games he plays