The market for gasoline in May is in equilibrium, at a market clearing price of $2.50 per gallon. After Memorial Day, the demand curve for gasoline increases, which causes the demand curve for gasoline to shift to the right, creating a shortage at $2.50 per gallon which causes the market clearing price of gasoline to fall. the demand curve for gasoline to shift to the right, creating a shortage at $2.50 per gallon which causes the market clearing price of gasoline to rise. the demand curve for gasoline to shift to the left, creating a shortage at $2.50 per gallon which causes the market clearing price of gasoline to rise. the demand curve for gasoline to shift to the left, creating a shortage at $2.50 per gallon which causes the market clearing price of gasoline to fall.