Question

Ervin sells vintage cars. Every three months, he manages to sell 13 cars. Assuming he sells cars at a constant rate, what is the slope of the line that represents this relationship if time in months is along the x-axis and the number of cars sold is along the y-axis?

Answer 1

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Answer 2

Answer:
`4.33\text{ cars per month.}`

Explanation:

Given : Ervin sells vintage cars. Every three months, he manages to sell 13 cars.

`m=\frac{\text{change in y}}{\text{change in x}}`

If time in months is along the x-axis and the number of cars sold is along the y-axis

Change in months : 3

Change number of cars : 13

The slope of the line that represents this relationship will be :-

`m=\frac{\text{Change in cars}}{\text{Change in months}}\\\\=(13)/(3)=4.33333\approx4.33\text{ cars per month.}`

Hence, the slope of the line =
`4.33\text{ cars per month.}`