Electricity Rates in Illinois Commonwealth Edison Company supplies electricity to
Chapter 1, Problem 99(choose chapter or problem)
Electricity Rates in Illinois Commonwealth Edison Company supplies electricity to residential customers for a monthly customer charge of $8.23 plus 10.438 cents per kilowatt-hour for up to 400 kilowatt-hours. (a) Find a linear equation that relates the monthly charge C, in dollars, to the number x of kilowatt-hours used in a month, (b) Graph this equation. (c) What is the monthly charge for using 100 kilowatt-hours? (d) What is the monthly charge for using 300 kilowatt-hours? (e) Write a practical sentence expressing how C changes for every unit change in x. Source: Commonwealth Edison Company, January 2010.
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