Supply & Demand Sandbox
No scenario, no scoring. Grab a curve, slide it, tilt it. See how equilibrium price and quantity respond. Load a real-world shock to see what shifts what.
Equilibrium is where the two curves meet. Shift demand right → higher price and quantity. Shift supply right → lower price, higher quantity. Steeper curves = less elastic response.
Two rules to memorize
Rule one: a movement along a curve is not a shift of the curve. Prices go up, quantity demanded goes down — that's a movement. A new tariff on imports, a heat wave, a viral TikTok — that's a shift.
Rule two: demand shifts move P and Q together, supply shifts move them opposite. Try the presets. Demand up = both up. Supply down = P up, Q down. Once you feel the two-by-two of directions, half of intro micro is done.