1. Below is a table for the cost of electricity in kWh from an electric company. Use the table to answer
problems a - c.
kWh, n
Cost ($), f(n)
a. What is the common difference of the sequence represented in the table? Select one.
A. $9.00
B. $0.90
C. $0.09
5
5.45
6
5.54
7
5.63
b. What is the explicit rule for the sequence? Select one.
A. f(n) = 0.09n
B. f(n) = 0.09n+ 5.00
C. f(n) = 0.9n+ 5.45
c. Find the cost of using 50 kWh of electricity. Select one.
A. $4.50
B. $9.50
C. $18.00