The given diagram illustrates the concept of Increase in Demand which may be defined as a situation when “more is demanded at the same price or same qty. is demanded at a higher price.” In the given diagram, the price OP remaining the same, the qty. demanded has increased from OQ to OQ1 The demand curve has shifted to the right. It also shows that when price rises from OP to OP1 Quantity demanded remains the same at the level of OQ. This is also a case of increase in demand.
