(Answered) change in quanityt demanded vs change in demandchange in quanityt demanded vs change in demand

➤ How does a price change affect quantity demanded?
A price change causes movement along the demand curve and changes the quantity demanded. When price falls, quantity demanded rises because of the substitution and income effects. When price rises, quantity demanded falls. Price elasticity of demand measures how responsive quantity demanded is and predicts the size of this movement.