pre cal
posted by kisha on .
Electricity Rates in Florida. Florida Power & Light Company supplies electricity to residential customers for a monthly customer charge of $5.69 plus 8.48 cents per kilowatthour for up to 1000 kilowatthours. (a) Write a linear equation that relates the monthly charge C, in dollars, to the number x of kilowatthours 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.

a. C = 8.48x + 5.69
b. (X,C),(0,5.69),(50,429.69),Add more
points for graphing.
c. C = 8.48*200 + 5.69 = $1701.69
d. Same procedure as c.
e. Slope = 8.48