Electricity Rates in Florida Florida Power&Light Company supplies electricity to residential customers for a monthly customer charge of $7.24 plus 9.07 cents per kilowatt-hour for up to 1000 kilowatt-hours.
(a) Write a linear equation that relates the monthly charge C, in dollars, to the number x of kilowatt-hours used in a month, 0 ≤x ≤ 1000.
(b) Graph this equation.
(c) What is the monthly charge for using 200 kilowatt(- hours?
(d) What is the monthly charge for using 500 kilowatt -hours?
(e) Interpret the slope of the line.
Source Florida Power&Light Company, March 2014.
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