Final answer:
The Three-Fifths Compromise proposed that each slave be counted as three-fifths of a person for representation and taxation purposes.
Step-by-step explanation:
The South proposed the Three-Fifths Compromise regarding the counting of slaves as part of the population.
Under this compromise, each slave was counted as three-fifths of a person to determine a state's representation in Congress and its federal tax bill.
This compromise was a result of debates between Southern states, who wanted slaves counted for representation but not taxation, and Northern states, who wanted the opposite. However, Southern states argued that slaves, although not considered citizens and denied many rights, should be counted as part of the population to increase their representation in the House.