Based on the graphs, it can be observed that for Store A, the cost of gasoline per gallon increases at a constant rate of $4 for every 5 gallons. However, for Store B, the cost of gasoline per gallon increases at a constant rate of $7 for every 4 gallons.
Comparing the two stores, it is evident that Store A has a cheaper cost of gasoline per gallon because the rate at which the cost increases for Store B is higher than Store A. Therefore, Store A offers a more cost-effective option for purchasing gasoline per gallon.
Use the image to answer the question.
An illustration shows two graphs depicting cost of gasoline per gallon in dollars in store A and B.
The first graph shows cost of gasoline per gallon in dollars in store A. The horizontal axis shows gallons ranging from 0 to 20 in increments of 5. The vertical axis shows the cost in dollars ranging from 0 to 70 in increments of 10. Four data points are plotted on the graph at left parenthesis 0 comma 0 right parenthesis, left parenthesis 5 comma 20 right parenthesis, left parenthesis 10 comma 40 right parenthesis, and left parenthesis 15 comma 60 right parenthesis. A line connects all the data points.
The second graph shows cost of gasoline per gallon in dollars in store B. The horizontal axis shows gallons ranging from 0 to 10 in increments of 2. The vertical axis shows the cost in dollars ranging from 0 to 30 in increments of 2. Three data points are plotted on the graph at left parenthesis 0 comma 0 right parenthesis, left parenthesis 4 comma 14 right parenthesis, and left parenthesis 8 comma 28 right parenthesis. A line connects all the data points.
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.
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