1 point: Axes are correctly labeled.
1 point: Demand curve is horizontal and labeled with some combination of “P,” “MR,” or “D.”
1 point: Marginal cost curve is labeled and slopes upward.
1 point: Profit-
1 point: Average total cost curve is labeled and U-
1 point: Average total cost is equal to price at the profit-
1 point: Marginal cost curve crosses the average total cost curve at the lowest point on the average total cost curve.