Final answer:
The total price paid for milk jugs is proportional to the number of jugs bought at a constant price of $3.02 each, since the grocery bags cost is $0 when you bring your own. This scenario exemplifies a proportional relationship where the total cost increases at a constant rate with each additional milk jug purchased.
Step-by-step explanation:
When considering the price of milk jugs at $3.02 each and no cost for bringing your own grocery bags, the relation between the total price and the number of milk jugs is a textbook example of a proportional relationship. Since you always bring your own bags, avoiding the $0.10 per bag cost, this extra charge is a non-factor in your total cost. Therefore, the total cost of your purchase is directly proportional to the number of milk jugs you buy. To illustrate, if you purchase 1 milk jug, you'll pay $3.02, for 2 jugs, it'd be $6.04, and so on, with the total price being the product of the quantity of milk jugs and the unit price of $3.02.
Economic concepts related to grocery shopping can be intriguing, especially considering instances where the price of goods or services increase or decrease due to market conditions. For example, consider how the price for gasoline fluctuated between $3.71 per gallon in June 2014 to $1.96 by January 2016, due to determinants such as what buyers are willing to pay and sellers are willing to accept. Knowledge of these economic principles aids in understanding the complex structure of market prices.