2.2.3—Supply curve

A supply curve plots price on the vertical axis and quantity supplied per stated period on the horizontal axis. It normally slopes upward from left to right, representing the law of supply.

Every point pairs one price with the quantity producers are willing and able to sell, ceteris paribus. A supply schedule can be transferred point by point to the curve.

Label both axes and units, plot price–quantity pairs accurately, and describe the direct relationship without treating the line as a time trend.

If firms supply 100 units at $8 and 140 at$10, plot $(100,8)$ and $(140,10)$; the second point lies higher and farther right.

The curve represents a defined good, market and period and does not require identical costs across firms. Movements and shifts are assessed separately in Objective 2.2.6.