The consumers will demand 27 units when the price of a product is $43, and 42 units when the price is $27. Find the demand model (express the price in terms of the quantity ), assuming it is linear.

Barrett is comparing the membership fees for two museums. the art museum charges a one-time fee of $8.25 plus $2.25 per month. the science museum charges a one-time fee of $10.75 plus $3.50 per month. how much does barrett save by joining the art museum instead of the science museum?