6. If ESU students are willing to pay $60 for a broadband straight-talk plan, but actually
pay $30 for a two-month straight-talk plan, their consumer surplus will be:
(a) $40 (b) $20 (c) $10 (d) $30
7. If a cross-price elasticity coefficient is negative, the two goods considered must be:
(A) Substitute goods (B) Complementary goods (C) Inferior goods (D) Normal goods
8. To protect consumers, policy makers usually set price floor. (A) True (B) False
9. If marginal utility is positive and falling, total utility must be: (A) Negative and
increasing (B) Positive and increasing (C) Decreasing and negative (D) constant