| A | B |
| COMPLEMENTARY GOODS | GOODS THAT ARE USED WITH EACH OTHER, SUCH AS CARS AND TIRES |
| DEMAND | THE AMOUNT OF A GOOD OR SERVICE THAT CONSUMERS ARE WILLING AND ABLE TO BUY AT DIFFERENT PRICES |
| DEMAND CURVE | THE LINE ON A GRAPH THAT REPRESENTS THE AMOUNT OF A GOOD OR SERVICE THAT CONSUMERS WILL BUY AT DIFFERENT PRICES |
| GRAPH | A DIAGRAM THAT SHOWS THE RELATIONSHIP BETWEEN TWO OR MORE SETS OF THINGS |
| INCOME | THE AMOUNT OF MONEY THAT A PERSON MAKES IN CERTAIN PERIOD OF TIME |
| INTERCHAEABLE | CAPABLE OF BEING PUT IN PLACE OF AONE ANOTHER |
| LAW OF DEMAND | THE ECONMIC LAW WHICH STATES THAT CONSUMERS WILL BUY MORE OF A GOOD OR SERVICE AS THE PRICE |
| SUBSTITUTE GOODS | GOODS THAT CAN TAKE THE PLACE OF ONE ANOTHER |