The table below shows the proportional relationship between the weight of dog food, in ounces, and the number of bags of dog food: Number of Bags of Dog Food Number of Ounces of Dog Food 3 36 4 48 5 60

When the number of bags is 3, the number of ounces is 36:

36 = k * 3

k = 36 : 3

k = 12

Also, when the number of bags is 4, the number of ounces is 48:

48 = k * 4

k = 48 : 4

k = 12

Finally, when the number of bags is 5, the number of ounces is 60:

60 = k * 5

k = 60 : 5

k = 12

Answer: The constant of proportionality is k = 12.