Answer:
Part A) 25
Part B) 225
Step-by-step explanation:
Part A
The slope of the graph gives us the mile per gallon of the car.
Recall that the slope of the graph is rise over run.
[tex]m = \frac{200}{8} = 25[/tex]
Therefore car gets 25 miles per gallon
Part B) Since we know the slope of the direct variation line, we substitute into y=kx to get:
[tex]y = 25x[/tex]
To find the number of miles the car travels using 9 gallons, we substitute x=9 to get:
[tex]y = 25 \times 9[/tex]
This gives us 225 miles
