=+9.1 The following are intended to explore what kinds of income-demand relationships are logically possible.

A. For each of the following, indicate whether the relationship is possible or not and explain:

a. A good is a necessity and has a positive income-demand relationship.

b. A good is a necessity and has a negative income-demand relationship.

c. A good is a luxury and has a negative income-demand relationship.

d. A good is quasilinear and has a negative income-demand relationship.

e. Tastes are homothetic and one of the goods has a negative income-demand relationship.