Electricity Rates in Florida Florida Power&Light Company supplies electricity to residential customers for a monthly customer charge of $5.90 plus 8.81 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 kilowatthours?
(d) What is the monthly charge for using 500 kilowatthours?
(e) Interpret the slope of the line.
Source: Florida Power&Light Company, March, 2011.
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