Sometimes airlines raise ticket prices as the flight departure date approaches in the hope of increasing revenue. The airlines raise their prices on the assumption that: consumer demand becomes less price-elastic as departure time approaches consumers are not aware of airline prices. consumer demand becomes more price-elastic as departure time approaches consumer demand is unrelated to prices Question 9 (Mandatory) (2 points) If your income increases and your consumption of bagels increases, other things equal, bagels are considered: an inferior good a substitute good. a Giffen good..