Question

A freight train is carrying goods across the country. The distance it has traveled varies directly with the number of gallons of fuel it has used. See the graph below.

Answer 1

Answer:

Step-by-step explanation:

The train uses

$\frac{400gallons}{200miles}$

If you reduce that you get that the train uses

$\frac{2gallons}{1mile}$

To find the slope of the line, we will use the 2 points on the coordinate plane where the graph goes through:  (0, 0) and (400, 200)

Applying the slope formula:

$m=\frac{200-0}{400-0}=\frac{1}{2}$