Question

Your friend has $80 when he goes to the fair. He spends $4 to enter the fair and $12 on food. Rides at the fair cost $1.25 per ride. Which function can be used to determine how much money he has left over after x rides?

A) f(x) = 1.25x + 64

B) f(x) = -16x + $80

C) f(x) = -1.25x + 64

D) f(x) = -1.25x - 64

Answer 1

C)
he has $64 after spending $4 to enter and $12 on food. Each ride is $1.25 so 1.25x. Thus $ leftover= 64-1.25x or f(x)= 64-1.25x which is the same as C.