Which of the following is true about the demand and revenue for a single-price monopoly firm? Multiple Choice Total revenue is a straight, upsloping line because marginal revenue is a straight line. The marginal revenue curve lies below the demand curve because any reduction in price applies to all units sold. The marginal revenue curve lies above the demand curve because any reduction in price applies to all units sold. The marginal revenue curve lies below the demand curve because any reduction in price applies only to the extra unit sold