The demand function for a cola type soft drink in general is Q = 20 – 2P, where Q stands for quantit… Show more The demand function for a cola type soft drink in general is Q = 20 – 2P, where Q stands for quantity and P stnd for price. a) Calculate point elasticities at prices of 5 and 9. Is the demand curve elastic or inelastic at these points? b) Calculate arc elasticity at the interval between P = 5 and P = 6. • Show less