What is the constant of proportionality for the relationship shown in this table? x 1 2 3 4
y 4 8 12 16

14

4

8

16
PLEASE

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?