I NEED HELP!!!
I will make the first answer the brainliest







Lynn wants to predict how much fuel her car will use based on its speed. She drove a car 100 km at each of the speeds below, and she measured how much fuel was used in each case. Her data is summarized in the graph below. Which statement is the best description of the association between these variables? Choose 1 answer:

(Choice A)

A

Driving at higher speeds always resulted in less fuel being used.


(Choice B)

B

The amount of fuel used was lowest at speeds around 60km/h



Choice C)

C

None of the above



A graph plots Fuel used, in liters per 100 kilometers, from 0 to 14, in increments of 1, on the y-axis, versus Speed, in kilometers per hour, from 0 to 140, in increments of 10, on the x-axis. 12 points fall in a single-file curved pattern with decreasing steepness from (20, 13) to a minimum at (60, 6), before rising diagonally to (120, 10). All values estimated.


Respuesta :

Answer:

B. The amount of fuel used was lowest at speeds around 60km/h.

Step-by-step explanation:

The decreasing part is from (20,13) to (60,6), which gives an average rate of

[tex]r=\frac{6-13}{60-20}=-\frac{7}{40}=-0.175[/tex]

Then, we have an increasing part from (60,6) to (120,10), which gives an average rate of

[tex]r=\frac{10-6}{120-60}=\frac{4}{60}=0.067[/tex]

Basically, at 60 km/h the fuel used was 6 liters per 100 kilometers. Notice that the other velocities make the car to use more liters per kilometers.

Therefore, the amount of fuel used was lowest at speeds around 60 km/h.

Answer:

Graph A

Step-by-step explanation:

Khan Academy (for the other question)