7. the law of demand
8. the relationship between individual and market demand schedules and curves
9. the effect of changes in price on quantity demanded, i.e. movement along the curve
10. non-price factors affecting demand
income, i.e. effect on normal and inferior goods
population
tastes and preferences
prices of substitutes and complements
expected future prices
11.the effect of changes in non-price factors on demand, i.e. increase or decrease in demand