551
1 point: Graph with vertical axis labeled “Quantity of output” or “Q ” and horizontal axis labeled “Quantity of labor” or “L”
1 point: Upward-
1 point: The slope of the total product curve is positive and decreasing.
1 point: Explanation that a positive and decreasing slope illustrates diminishing returns to labor because each additional unit of labor increases total product by less than the previous unit of labor