​[Figure description: The graph has price on the vertical axis and quantity on the horizontal axis. The marginal revenue and the demand curves are two straight downward sloping lines. The marginal revenue curve begins at a lower point than the demand curve on the vertical axis and is steeper, hence it is always below the demand curve. There are three combinations of price and quantity marked on the demand curve. At price 12, the quantity demanded is 8; at price 10, the quantity demanded is 9; at price 8, the quantity demanded is 10.