Question

A homeowner's electric bill for the month was $147.60 for 1,800 kilowatt-hours of energy used.

Which equation represents the cost in dollars of the electricity, y, and the number of kilowatt-hours of energy used, x?
A: y= 12.2x
B: y= 8.2x
C: y=0.12x
D: y=0.082x

Answer 1

D

First take $147.60 and divide it by 1,800. The answer to that would be the x-value. So then just input the numbers. y=0.082x

Answer 2

The answer is A.

If you multiply 12.2 by the amount spent on electricity 147.60, you get 1800 which was the amount of energy that was used by the homeowner.