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An Electrician Charges a Flat Fee of $90 for a Home

Question 34

Essay

An electrician charges a flat fee of $90 for a home service call. In addition he charges $25 for every 20 minutes as labour cost. Draw a graph to show the total charge against the time in hours. Calculate the slope of the line.

Correct Answer:

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Fixed cost = $90 (FC)
Variable...

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