The correct answer is D.
Function notation is typically written as "f(x)" where "f" is the name of the function and "x" is the input or variable. In this case, the function "C" represents the total cost, and "g" represents the number of gallons.
Since the gas station is charging $2.19 per gallon, the total cost C(g) can be calculated by multiplying the price per gallon (2.19) by the number of gallons purchased (g):
C(g) = 2.19g
Therefore, the answer is D, C(g) = 2.19g.
A gas station charges $2.19 per gallon of gas. Use function notation to describe the relationship between the total cost C(g) and the number of gallons purchased g.
A. C(g) = -2.19g
B. g = 2.19C(g)
C. C(g) = g + 2.19
D. C(g) = 2.19g
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