c = 60 + 20 (t-1) = 20 t + 40
slope = $20 / hour
A roofer charges $60 for the first hour of a service call and $20 per hour for each additional hour, as shown on the graph below.
Look at the above Roofer’s Prices graph and then answer the following questions.
Part A What is the slope of a line joining the points on this graph? Show your work or explain your answer.
Part B What does the slope represent?
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