Question

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

Answer 1

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