2. Calculating marginal revenue from a linear demand curve The blue curve on the following graph represents the demand curve facing a firm that can set its own prices. Use the graph input tool to help you answer the following questions. You will not be scored on any changes you make to this graph. Note: Once you enter a value in a white field, the graph and any corresponding amounts in each grey field will change accordingly. Graph Input Tool 250 Market for Goods 225 Quantity 25 200 Demanded (Units) 175 Demand Price 125.00 (Dollars per unit) 150 125 PRICE (Dollars per unit] 100 75 Demand 25 5 15 20 25 130 135 45 150