Robert only consumes X and Y, and his indifference curves have the usual convex shape. Consider the consumption bundles (3, 9), (6, 6), and (9, 3) (hint: they lie on a straight line). If Robert is indifferent between (3, 9) and (9, 3), then:

A) he prefers (3, 9) over (6, 6).

B) he prefers (9, 3) over (6, 6).

C) he prefers (6, 6) over both (3, 9) and (9, 3).

D) he prefers (6,6) over (3,9) but not over (9,3).

C) he prefers (6, 6) over both (3, 9) and (9, 3).

Explanation:

Robert has 3 options for combinations of X and Y that is (3, 9), (6, 6), and (9, 3).

If he is indifferent to combinations (3,9) and (9,3). It means his preference is the third option (6,6).

Robert prefers to have equal combination of X and Y.

enlightenment impacted society by introducing the idea that mankind could use reason to discover the laws of the world and the rights of mankind. these ideals affected all factions of society, from politics to religion.

the answer would be voluntary exchange -

"the act of buyers and sellers freely and willingly engaging in market transactions. moreover, transactions are made in such a way that both the buyer and the seller are better off after the exchange than before it occurred."

hope this : )

-shy