What is the average rate of change from -3 to 0

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

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

What is the location of point g, which partitions the directed line segment from d to f into a 5: 4 ratio? –1 0 2 3