If a demand curve for Pizzas would have the follow change in price and quantity: First price of $15 with a quantity of 20 pizzas, it then decreases to $10 and 40 pizzas would be purchased. Answer the following questions using this demand information. (3 points) a. Provide the ordered pairs for point A & point B. b. Calculate slope from point A to point B c. Interpret your findings and give a statement