Economists assume people are motivated by

Tobin's q is

A) the ratio of a firm's market value on the stock and bond markets to the replacement cost of its capital stock. B) the ratio of a firm's gross investment to its capital stock less its replacement cost of capital. C) a firm's replacement cost of capital less its value on the stock and bond markets. D) the ratio of a firm's replacement cost of capital to its gross investment.

If the price doesn't change, no matter how much output is produced, the total revenue curve is a(n)

a. upward-sloping straight line b. downward-sloping straight line c. horizontal straight line d. U-shaped curve e. hill-shaped curve