A. There is a proportional relationship between cinnamon rolls and the cost of cinnamon rolls because they are sold at the same price for each roll. The unit rate of a cinnamon roll is $2.50. If you purchase four rolls, the cost would be $10.00, which is still the same price per roll.B. There is no proportional relationship between pies and the cost of pies because one pie costs $12.50 while two pies cost $22.00. The unit rate of a single pie is $12.50. However, if you purchase two pies, the cost would be $22.00. The unit rate in this case is $11.00 per pie. Thus, we can conclude that there is no proportional relationship between the number of pies and the cost of pies.