At a Price of $2

Short Answer

At a price of $2.65 per gallon, the average weekly demand by consumers for gasoline is 42 gallons. If the price rises to $2.75, the weekly demand drops to 38 gallons. Assuming demand is linear, let , where Q is the weekly quantity of gasoline demanded and p is the price per gallon. Then b = _____ and m = _____.