1. Electrical companies charge customers based on the amount of kilowatt-hours (kWh) used during a
billing period. The graph below shows the cost in dollars for various amounts of energy used in
kilowatt-hours.
Electric Company Charges
305
IZ
os
Cost ($)
105
0
200
400
600 W, 800
1000
1200
What is the electric company's billing plan based on cost per kilowatt-hour (kWh)?
A Customers pay $5.00 for use of energy up to 200 kWh. Use between 200 and 600 kWh will cost
$0.50 per kWh. Use between 600 and 1,000 kWh will cost $1.00 per kWh.
B Customers pay $5.00 for use of energy up to 200 kWh. Use between 200 and 600 kWh will cost
$25 per kWh. Use between 600 and 1,000 kWh will cost $50 per kWh.
C Customers pay $0.05 for use of energy up to 200 kWh. Use between 200 and 600 kWh will cost
$0.25 per kWh. Use between 600 and 1,000 kWh will cost $0.50 per kWh.
D Customers pay $5.00 for use of energy up to 200 kWh. Use between 200 and 600 kWh will cost
$0.25 per kWh. Use between 600 and 1,000 kWh will cost $0.50 per kWh.