Question

Salma is driving on the highway. She begins the trip with 16 gallons of gas in her car. The car uses up one gallon of gas every 20 miles. Let G represent the number of gallons of gas she has left in her tank, and let D represent the total distance (in miles) she has traveled. Write an equation relating G to D, and then graph your equation using the axes below.

Answer 1

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Answer:

  G = 16 -D/20

Step-by-step explanation:

Each mile driven uses 1/20 of a gallon of gas, so the number of gallons used for D miles is D/20. The number of gallons remaining will be 16 less the number used.

  G = 16 -D/20

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The graph of the equation is shown in the attachment. Please note the useful domain and range are restricted to the first quadrant. D (miles) is on the horizontal axis; G (gallons) is on the vertical axis.