1 point: Vertical axis and horizontal axis labels are correct (“Price, cost of unit” on vertical axis; “Quantity” on horizontal axis).
1 point: The line representing demand, marginal revenue, and price is horizontal and correctly labeled.
1 point: Marginal cost is “swoosh” shaped or upward-
1 point: Average total cost is U-
1 point: Quantity is found where MC = MR.
1 point: Average total cost reaches its minimum point at the profit-
(3 points)