The owner of a bookstore recorded the following information from last
week:
12
18
24
30
36
42
Number of
Customers,
С
Amount of
Sales,
S
$80
$110
$140
$170
$200
$230
According to this information, which equation describes the relationship
between the number of customers and the amount of sales?
A. S = 50 + 20
C. s = 6c + 20
B. s = c + 30
D. s = 6c + 8