Answer: There are five significant factors that cause a shift in the demand curve: income, trends and tastes, prices of related goods, expectations as well as the size and composition of the population.
Step-by-step explanation:
The Two Types of Demand Curves
If demand is perfectly elastic, the curve looks like a horizontal flat line. Inelastic demand is when a price decrease won't increase the quantities purchased. An example of this is bananas. No matter how cheap they are, there's only so many you can eat before they spoil.