Assume that you have a budget of $30 to spend on milk and cereal only. The price of milk is PM = $5 and the price of cereal is PC = $3.50.
a) What is the most you can purchase of cereal?
b) If you purchase 3 units of milk (QM = 3), then how many units of cereal can you purchase at most?
c) What is the slope of the budget constraint?