Since the mid-1980s, tariff rates in most nations have risen

Fixed costs can be defined as costs that

a. vary inversely with production. b. vary in proportion with production. c. are incurred only when production is large enough. d. are incurred even if nothing is produced.

Which of the following combinations are unattainable given a consumer's budget line?

a. Combinations that fall inside the budget line b. Combinations on the midpoint of the budget line c. Combinations that fall on the budget line d. Combinations that fall beyond the budget line e. A combination that intersects either of the axes