Question

Question
Use the image to answer the question.

Two line graphs comparing Cost of Gasoline per Gallon for Store A and B in dollars showing a linear relationship between Gallons and cost in dollars.

The proportional relationship between the cost of gasoline and the number of gallons of gasoline from Store A and Store B are displayed in the graphs. Use the graphs to interpret the store that has the cheaper cost of gasoline per gallon.

(1 point)
Responses

Store B has the cheaper gasoline. The cost of gasoline at Store A is $100 per gallon.
Store B has the cheaper gasoline. The cost of gasoline at Store A is $100 per gallon.

Store A has the cheaper gasoline. The cost of gasoline is $0.25 per gallon.
Store A has the cheaper gasoline. The cost of gasoline is $0.25 per gallon.

Store B has the cheaper gasoline. The cost of gasoline is $3.50 per gallon.
Store B has the cheaper gasoline. The cost of gasoline is $3.50 per gallon.

Store B has the cheaper gasoline. The cost of gasoline at Store A is $5 per gallon.

Answer 1

Store B has the cheaper gasoline.

From the graphs (lines through the origin), the price per gallon is the slope:
- Store A: rise/run = (20 − 0)/(4 − 0) = 20/4 = $5.00 per gallon.
- Store B: rise/run = (7 − 0)/(2 − 0) = 7/2 = $3.50 per gallon.

So Store B is cheaper at $3.50/gal.