Answer: The headcount index (P0) is used to measures the proportion of the population which are poor.
The poverty gap index (P1) is used measure the extent to which individuals fall below the poverty line.
Step-by-step explanation:
The headcount index (P0) like the name suggests is used to measure or know the proportion of a population which are poor, this does not indicate or show us how poor, the poor people in that society are.
The poverty gap index (P1) is used measure the extent to which individuals fall below the poverty line. This is used or compared to a poverty line already created. To know how far below individuals are under the poverty line system.