Karole's income rises from $50,000 to $75,000 and her income tax increases from $8,000 to $9,500.Her average tax rate is 6%

In the figure above, curve A is the ________ curve

A) average fixed cost B) average variable cost C) average total cost D) marginal cost

If individuals do not hold currency, we know that

A) M = D. B) H = R. C) the money multiplier is 1/?. D) all of the above