Question

An online store currently charges
$
15
per month for two-day delivery service. The store is changing its price structure for new customers and will now charge an initial one-time sign-up fee of
$
30
in addition to the
$
15
per month. Let
y
represent the total cost for
x
months of using the delivery service.

Ricky has a
$
100
gift card that he will use to rent movies and televisions series at the online store.

Which equation represents the total cost of using the delivery service with the original pricing structure?



A.
y
=
15
x

B.
x
=
15
y

C.
y
=
15
+
x

D.
x
=
15
+
y

Answer 1

A. y = 15x

Reason: At $15 per month, the total cost for x months is 15 times x, with no initial fee.