two goods that are bought and used together 2. desire to own something and the ability to pay for it: desire to own something and the ability to pay for it 3. consuming less of a good and more of another as a reaction to a price increase: consuming less of a good and more of another as a reaction to a price increase 4. goods that are used in place of one another: goods that are used in place of one another 5. concept that consumers will buy more of a good when its price is lower and less when its price is higher: concept that consumers will buy more of a good when its price is lower and less when its price is higher 6. change in consumption that results when a price increase causes real income to decline: change in consumption that results when a price increase causes real income to decline Column B a. demand b. law of demand c. income effect d. substitution effect e. substitutes f. complements