illustrate with a supply curve or a supply schedule. When economists refer to quantity supplied, they mean only a

certain point on the supply curve, or one quantity on the supply schedule. In short, supply refers to the curve and

quantity supplied refers to a (specific) point on the curve.

Figure 3.3 illustrates the law of supply, again using the market for gasoline as an example. Like demand, we

can illustrate supply using a table or a graph. A supply schedule is a table, like Table 3.2, that shows the

quantity supplied at a range of different prices. Again, we measure price in dollars per gallon of gasoline and

we measure quantity supplied in millions of gallons. A supply curve is a graphic illustration of the relationship

between price, shown on the vertical axis, and quantity, shown on the horizontal axis. The supply schedule and

the supply curve are just two different ways of showing the same information. Notice that the horizontal and
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