Cchange in demand and a change in the quantity demanded

Question

Distinguish between a change in demand and a change in the quantity demanded?

Answer 1

Lead to increased demand is extra buyers, greater desire for commodity, higher incomes (assuming a normal good), lower incomes (assuming an inferior good), increased price of replacements, a decreased price of complements, and an expectation of higher future prices.  As increase in demand show a shift of entire demand curve to the right. The reverse of all the above will lead to decreased demand and will show as a shift of the entire demand curve to the left.