Which of the following is true of the total revenue curve faced by a perfectly competitive firm? It is a linear curve showing a positive relationship between price and output. It is a straight line emanating from the origin with a constant slope. It is a downward-sloping straight line with a constant slope. It is a negatively sloped linear curve showing an inverse relation between price and output.hen the demand for the good produced by a monopoly is price elastic, a decrease in price will: decrease the total revenue. increase the average revenue. increase the total revenue. increase the marginal revenue