Question

Using the graph below, what is the best estimate of how much gas is used on a 250-mile car trip if the equation for the line of the best fit is y=0.03x+0.25

Answer 1

A. 7.8 gallons.

Explanation:

We have been given the equation of line of best fit
`y=0.03x+0.25`. We are asked to find the estimated amount of gas used on a 250 mile trip.

We can see that x-axis represents number of miles and y-axis represents gallons of gas used.

To find amount of gas used on a 250 mile trip, we will substitute
`x=250` in our given equation as:

`y=0.03(250)+0.25`

`y=7.5+0.25`

`y=7.75`

`y\approx 7.8`

Therefore, 7.8 gallons of gas will be used on a 250 milt trip and option A is the correct choice.