1. What happens when the price of a substitute for a good increases? a. Demand increases and the demand curve shifts to the right. b. Demand increases and the demand curve shifts to the left. c. Demand decreases and the demand curve shifts to the left. d. Demand decreases and the demand curve shifts to the right. 2. What happens when the price of an input increases? Supply increases and the supply curve shifts to the left. Supply decreases and the supply curve shifts to the right. Supply decreases and the supply curve shifts to the left. Supply increases and the supply curve shifts to the right