Refer to the table above. What is the equilibrium quantity of notebooks?

The MPC is equal to the

A) level of consumption expenditure divided by the level of total disposable income that brought it about. B) change in consumption expenditure divided by the total disposable income that brought it about. C) change in disposable income divided by the change in consumption expenditure. D) level of consumption divided by the change in disposable income that brought it about. E) change in consumption expenditure divided by the change in disposable income that brought it about.

If the utility function (U) between food (F) and clothing (C) can be represented as U = , the marginal utility of food equals

A) . B) . C) 1/2 . D) 1/2 .