Key Idea: Topic 2.1 explains what demand is, why the demand curve slopes downward, what shifts it, and the crucial exam skill of distinguishing movements vs shifts.
โ Core definitions
If a question says 'want' without 'able to buy', it is NOT effective demand.
๐ Why demand slopes downward
๐ Non-price determinants (shift the curve)
โก Movements vs shifts โ the KEY exam skill
Every time you draw a demand diagram, label: axes (P, Q), curve (Dโ, Dโ), direction of shift, and new equilibrium.