Definition, drawing and interpretation of appropriate diagrams. A demand curve to be drawn and used to illustrate movements along a demand curve with appropriate terminology, for example extensions and contractions in demand. The link between individual and market demand in terms of aggregation. The causes of shifts in a demand curve with appropriate terminology, for example increase and decrease in demand.
Calculation of PED using the formula and interpreting the significance of the result. Drawing and interpretation of demand curve diagrams to show different PED. The key influences on whether demand is elastic or inelastic. The relationship between PED and total spending on a product/revenue, both in a diagram and as a calculation. The implications for decision making by consumers, producers and government.