Tyler is going on a road trip with his family. He pays $16.80 for 4 gallons of gas. What is the cost per gallon? What is the cost of 3 gallons? 5 gallons?
The cost per gallon of gas is $4.2. ($16.80 divided by 4 gallons) The cost of 3 gallons is $12.6. (3 gallons times $4.2) The cost of 5 gallons is $21. (5 gallons times $4.2) You can continue the pattern of $4.2 dollars times each gallon forever.