Question

is the total cost to fill a car gas tank a direct or inverse variation with respect to the number of gallons used ?...​

Answer 1

Answer: Direct variation

Explanation:

Let y represent the total cost and x represent the number of gallons.

Assume gas cost $5 per gallon. How would you decide how much to pay?

y = 5x -->
`(y)/(x)=5` which is direct variation