Question

Parking Garage A charges a flat rate per hour to park. The equation
y
=
9
x
represents the total cost,
y
, in dollars, of parking at Parking Garage A for
x
hours.



Parking Garage B charges a flat entry fee plus an hourly rate. The equation
y
=
6
x
+
15
represents the total cost,
y
, in dollars, of parking at Parking Garage B for
x
hours.



For which number of hours will parking at Parking Garage A be a better deal?

A.
4
hours

B.
5
hours

C.
6
hours

D.
9
hour

Answer 1

Compare costs: 9x < 6x + 15 → 3x < 15 → x < 5. So Parking Garage A is a better deal for fewer than 5 hours. From the choices, 4 hours (A) is correct.