Many of the following problems can be modeled with a linear equation. Analyze them and identify what quantities the variables x and y represent. The information provided in the problems is adequate to determine a point and a slope or two points on the line.
City Electric Company calculates a customer’s monthly electricity bill as $5.00 plus 7.8 cents for each kWh of electricity used.
(a) Does the information provided give two points or a point and a slope?
(b) Write the linear equation relating kWh used and the monthly bill.
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