Price quantity graph represents the cost of the goods or services to the quantity of the goods or service on the coordinate plane. The cost of the gasoline is $3.8 per gallons.
The graph of the cost of the gasoline is attached below.
The x axis represents the quantity of the gasoline in gallons.
The y axis represents the cost of the gasoline in the dollar.
Price quantity graph represents the cost of the goods or services to the quantity of the goods or service on the coordinate plane.
Thus the given graph is plotter between the quantity of the gasoline in gallons and cost of the gasoline in the dollar. To get the cost of the gasoline in dollars per gallons we need to divide the quantity of the gasoline to the respective cost at shown in the graph.
Select a point (5/2, 19/2). Here the quantity of the gasoline is 19/2 gallons and the cost is $5/2.
Let c is the cost in dollars per gallons. Therefore,
[tex]c=\dfrac{19}{2} \div \dfrac{5}{2} [/tex]
Convert the divide sign into the multiply sign by changing the numerator and denominator of one of the fraction by each other. Thus,
[tex]c=\dfrac{19}{2} \times \dfrac{2}{5} \\ c=\dfrac{19}{5} \\ c=3.8[/tex]
Thus the cost of the gasoline is $3.8 per gallons.
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