Florida Power & Light Company supplies electricity to residential customers for a monthly customer charge of $7.57 plus 9.01 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.
Equations and Inequations
Equations and inequalities describe the relationship between two mathematical expressions.
Linear Functions
A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.
Florida Power & Light Company supplies electricity to residential customers for a monthly customer charge of $7.57 plus 9.01 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.
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