Question

The line graph shows the miles per gallon for a car.

What is the unit rate of gas usage for the car?

Answer 1

35 miles per gallon is the unit rate of gas usage for the car.

Explanation:

Slope of the line will give the unit rate of gas usage for the car:

Slope m for points
`(x_1,y_1)(x_2,y_2)`:

`m=(y_2-y_1)/(x_2-x_1)`

We have :

`(x_1,y_1)(x_2,y_2)` : (2,70) (3,105)

Slope of the lin e:

`m=(105-70)/(3-2)=(35)/(1)`

35 miles per gallon is the unit rate of gas usage for the car.