Final answer:
The poverty measure described in the question is relative poverty, which is an economic condition in which a family or individuals have 60% income less than the average median income.
Step-by-step explanation:
The poverty measure described in the question is relative poverty.
Relative poverty is an economic condition in which a family or individuals have 60% income less than the average median income. This income is sometimes called the poverty level or the poverty line.
For example, if the median income in a country is $50,000, then the poverty line would be set at 60% of that amount, which is $30,000. Individuals or families earning less than $30,000 would be considered below the poverty line.