To help the environment and make some extra money, Darnell takes his empty cans to the Cash Not Trash recycling shop. The shop pays cash based on the total weight of the cans Darnell brings in for recycling.
There is a proportional relationship between the weight (in pounds) of the cans Darnell brings into the shop, x, and the amount (in dollars) the shop pays Darnell, y.
x (pounds) y (dollars)
6 $3
10 $5
12 $6
20 $10
What is the constant of proportionality? Write your answer as a whole number or decimal.
