Suppose the market demand curve is P = 40 - 2Q and the constant marginal cost of production is MC = 20. Which of the following is a valid expression for the collusion curve?

Twenty years ago a stove cost $300 and a refrigerator cost $1,500. Today a stove costs $600, while a refrigerator costs $1,800. Which of the following statements is TRUE?

A) The relative price of stoves and refrigerators has not changed. B) The relative price of a refrigerator has increased. C) The relative price of a stove has increased. D) The money price of a refrigerator has fallen.

Based on the figure above, short-run equilibrium occurs at the price level of

A) 120 and real GDP of $5 trillion. B) 130 and real GDP of $10 trillion. C) 140 and real GDP of $15 trillion. D) 130 and real GDP of $15 trillion.