suppose a consumer has utility function u(y1,y2)=y1+y2 (a) in a well-labeled diagram illustrate the indifferent curve which yields a utility level of 3.5.
(b) if the consumer has income M and faces the price p1 and p2 for y1 and y2 respectively derive the demand function for the goods.
(c) what type of preferences are associated with such a utility function?