The total cost of gasoline varies directly with the number of gallons purchased. Gas costs $1.77 per gallon. Write a direct variation to model the total cost c for g gallons of gas.

a. C= 1.77g

b. G= 1.77c

c. C= g/1.77

d. C= g + 1.77

The answer would be "a" Cost (C) equals 1.77 times the number of gallons (g) C = 1.77g

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