graph shown depicting a perfectly competitive firm. If average variable cost is $3 at quantity 450, points A through E represent the: A line graph plots cost versus quantity for the marginal cost curve.A line graph plots cost, which ranges from 0.0 to 7.0 dollars with an increment of 1.0 dollars, against quantity, which ranges from 0 to 850, with an increment of 50 for an ascending curve with 5 points A to E. The curve begins at 3 dollars, then softly ascends to 4 dollars, then climbs to 5 dollars, again ascends to 6.5 dollars, then peaks at 7 dollars, and is labeled marginal cost. Multiple Choice firm's total cost curve. firm's total revenue curve. demand for the firm's product. firm's supply curve