In the above figure, which curve shows a positive relationship between x and y?

A country that must decrease production of one good in order to increase the production of another

A) must be using resources inefficiently. B) must be producing on its production possibilities frontier. C) must be producing beyond its production possibilities frontier. D) must have private ownership of property.

Which of the following is not an example of a derived demand?

A) Several of the animated films released between 1999 and 2001 failed to earn a profit, which caused some companies to stop making these films, thereby decreasing the demand for animators. B) As advancements in medical technology increase the safety and success of laser eye surgery, the demand for opticians has decreased. C) Millicent Manning, the owner of a furniture store, is concerned that her sales have fallen for the past six months. She attributes this to the downturn in the real estate market. D) Seth Bullock, a personal-injury attorney, complains that he is earning far less now than a few years ago largely because personal injury cases have been undercut by state laws limiting class-action suits and payouts on damages.