The function f(x) = 4x + 12 can be used to model the total cost of attending Six Flags and riding x, number of rides. The function g(x) can be used to model the cost of attending Hershey park. Hershey Park charges it's customers a $15 entry fee. Both parks charge the same amount per ride, x. Write a function to represent the total cost of attending Hershey Park

answer: -1

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional