Demand and Supply Extra Help Help me Understand Demand Law of DemandSubstitution and Income EffectSubstitutes and Complements Effect on DemandChanges in Expected Future PriceChanges in Income, Population, or Preferences Normal and Inferior GoodsDemand Lesson Summary - ReadingDemand and Law of Demand Practice Questions Help me Understand Supply Law of SupplyFactors Effecting Supply Help me Understand Equilibrium Market EquilibriumChanges in Equilibrium Mr Larsen Recorded Video Links Creating a Supply and Demand Curve - Reviewing Equilibrium, Surplus, and Shortage.