Changes in Demand

Readers Question: What is the difference between a Change in Qty Demanded/Supplied and a Change in Demand/Supply? If possible, would you please give an example.

I’m not sure. But, this might help.

If there is a change in price, there is a movement along the demand curve. An increase in price, P1 to P2 causes a change in quantity demand from Q2 to Q1

Diagram of movement Along Demand Curve

A shift in the demand curve occurs when the whole demand curve moves to the right or left. For example, an increase in income would mean people can afford to buy more widgets even at the same price.