The graph is a marginal cost curve that compares expenses for producing apple pies. A graph titled Marginal Cost of Producing Pies has quantity supplied on the x-axis, from 0 to 6 pies, and marginal cost on the y-axis, from 0 to 1 dollar and 60 cents in increments of 20 cents. The cost increases from 0 pies to 1 pie and then decreases to 3 pies. The cost again begins to increase at 4 pies. According to the graph, the marginal cost begins to increase when the producer makes two pies. three pies. four pies. five pies.