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A rental car company charges a daily rate a car plus a service of $50.The total cost of renting a car for x days is shown in the table below

A rental car company charges a daily rate a car plus a service of $50.The total cost-example-1

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We can do the next operation in order to have the rate of change


r=(y_2-y_1)/(x_2-x_1)

where

(85,2)=(x1,y1)

(137.5,5)=(x2,y2)

we substitute the values


r=(137.5-85)/(5-2)=(35)/(2)=(17.5)/(1)

the answer is 17.5/1

User Waqas Shabbir
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