The following schedule and graph provides information about an aggregate demand (AD) curve and an aggregate supply (AS) curve. Both curves are assumed to be straight lines. Average Price (Dollars per Unit) Quantity Demanded (Units per Year) Quantity Supplied (Units per Year) $ 800 100 700 700 200 600 600 300 500 500 400 400 400 500 300 300 600 200 200 700 100 Two lines are presented on a coordinate plane.The horizontal axis is labeled real output in quantity per year and the vertical axis is labeled price level in average price. Both the axes range from 0 to 800 in increments of 100. An increasing line starts from (100 comma 200), passes through (200 comma 300), (300 comma 400), (400 comma 500), (500 comma 600), (600 comma 700), and ends at the point (700 comma 800). The decreasing line starts from (100 comma 800), passes through (200 comma 700), (300 comma 600), (400 comma 500), (500 comma 400), (600 comma 300), and finally ends at (700 comma 200). Both the lines intersect at (400 comma 500)