Six pounds of grapefruit cost $3. What is the cost per pound?
You can use a double number line to help you find rate and
unit rate. Start with the ratio you know: $3 for 6 pounds.
Divide both $3 and 6 pounds by 3 to get $1 for 2 pounds.
Then divide $1 and 2 pounds by 2 to find the cost per
pound, which is $0.50 for 1 pound.
What is the cost per pound