The federal government's support of farm prices in the United States has affected the value of farm property

The OLS residuals in the multiple regression model

A) cannot be calculated because there is more than one explanatory variable. B) can be calculated by subtracting the fitted values from the actual values. C) are zero because the predicted values are another name for forecasted values. D) are typically the same as the population regression function errors.

Refer to the diagram, which pertains to a purely competitive firm. Curve A represents:

A. total revenue and marginal revenue.
B. marginal revenue only.
C. total revenue and average revenue.
D. total revenue only.