The function y=f(x) is graphed below. What is the average rate of change of the function f(x) on the interval −4≤x≤−2?

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?