Discrimination based on age, race, gender, or family status very likely increases as a result of rent ceilings

Which of the following is not an assumption of the linear breakeven model:

a. constant selling price per unit b. decreasing variable cost per unit c. fixed costs are independent of the output level d. a single product (or a constant mix of products) is being produced and sold e. all costs can be classified as fixed or variable

Assume the table shown is for a hat factory, and shows the total production of hats given various numbers of employees. What is the marginal product of the ninth worker?

A. 10
B. 5
C. 15
D. 290