Question

the total cost of gasoline varies directly with the number of gallons purchased. Gas costs $1.89 per gallon. Write a direct variation to the model the total cost c for g gallons of gas

Answer 1

1.89g

Explanation:

Answer 2

The direct variation between the total cost c and the number of gallons g of the gas may be expressed as the following,
c = kg
where k is the constant of variation. In this item, it is the cost of gasoline per gallon which is $1.89. Thus, the final variation equation is,
c = 1.89g