(110. Two goods are if an increase in the price of one causes a fall in demand for the other. A. Substitutes B. Complementary C. Geffen (111. If the consumer thinks that (x1, x2) is at least as good as (y1, y2) and that (y1, y2) is at least as good as (x1, x2), then the consumer must be between the two bundles of goods. A. Weakly preferred B. indifferent C. strongly preferred (112. If the economy sours and people worry about their future job security, demand for new autos may now. A. Fall B. Rise C. not change (113. Economists use the supply and demand model to analyze A. competitive markets B. imperfect market C. monopolistic market