Question

What two specific things were being fought over in the 3/5 compromise that would be based on population

Answer 1

The argument was about whether slaves would count as part of the population. The population affected how many seats the states got in the house. Southern states wanted them to count (more slaves were owned here) and Northern states did not want them to count (lesser slaves were owned here). Eventually they decided to count each slave as 3/5th of a citizen.

btw i might have mixed the north and south up so make sure you double check that online lol