Refer to the graph below. What could cause the consumer equilibrium point to shift from point a to point b?

Consider the budget line in the above figure. If the consumer's income is $120, then the price of a movie is

A) $24 per movie. B) $12 per movie. C) $5 per movie. D) More information is needed to determine the price of a movie.

If firms in a competitive market are not identical, then an increase in cost will

A) shift marginal cost to the right. B) push the most inefficient firms out of the market. C) push the most efficient firms out of the market. D) Need more information.