Please help me. An ice cream shop serves Chocolate Milkshakes that are made with ice cream and milk. There is a proportional relationship between the number of scoops of ice cream and the amount of milk needed to make them. For every 1 scoop of ice cream, 1/2 cup of milk is needed, and for every 5 scoops of ice cream, 2 1/2 cups of milk are needed.

Part A: Find the constant of proportionality. Show every step of your work.

Part B: Write an equation that represents the relationship. Show every step of your work.

Part C: Describe how you would graph the relationship. Use complete sentences.

Part D: How many cups of milk are needed for 18 scoops ice cream?