We can find the unit rate by dividing gallons by price. 70/21 is 3 1/3 and 50/15 is 3 1/3. Both are the same prices so it depends on your personal choice. I would choose the gas that is better for the environment.
We can find the unit rate by dividing gallons by price. 70/21 is 3 1/3 and 50/15 is 3 1/3. Both are the same prices so it depends on your personal choice. I would choose the gas that is better for the environment.
+8 
