Answer:
1 gallon of gas = $2.5
Step-by-step explanation:
If you are finding the rate just set up the ratio equation.
6 gallons = $15
6 : 15
6/15
Now you want to find the price of 1 gallon, with x as being the price.
6/15 = 1/x
Cross multiply
6 · x = 1 · 15
6x = 15
Solve x.
x = 15 ÷ 6
x = 2.5
