Math Problem Statement
Westside Energy charges its electric customers a base rate of $7.00 per month, plus 15¢ per kilowatt-hour (kWh) for the first 300 kWh used and 4¢ per kWh for all usage over 300 kWh. Suppose a customer uses x kWh of electricity in one month.
(a) Express the monthly cost E as a piecewise defined function of x. (Assume E is measured in dollars.)
E(x) = if 0 ≤ x ≤ 300 if 300 < x
(b) Graph the function E for
0 ≤ x ≤ 600.
Solution
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Math Problem Analysis
Mathematical Concepts
Piecewise Functions
Linear Functions
Formulas
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Theorems
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Suitable Grade Level
Grades 10-12
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