Accessible descriptiоn. On the y-аxis is price (Dоllаrs per gаllоn of milk) and on the x-axis is quantity (gallons of milk per week in thousands). Four lines are depicted. Line H is horizontal at a price of $2.00. Line F is vertical at a quantity of 200. Line G is upward sloping passing through the point (200, 2). Line I is downward sloping through the point (200, 2). f1q18g1 (2).jpg In the above figure, if the milk industry is perfectly competitive, then the firm's marginal revenue curve is represented by