For this case, the first thing we must do is define a variable:
g: number of gallons of gas.
c (g): total cost.
We then have a linear function of the form:
c (g) = 2.19 * g
Answer:
A function notation to describe the relationship between the total cost c (g) and the number of gallons purchased is:
c (g) = 2.19 * g
A because the length is greater
1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60 are all the factors of 60. If a list includes any number other than what is listed here, it is NOT a choice.