I've seen the formula before, but can't find it at the moment.
The more Steem Power that upvotes you, the higher your reputation will go. The opposite is also true, the more SP that flags you, the lower your reputation will go.
The reputation system uses a log10 scale with some tweaks. This means:
- A score of 30 is about 10x better than a score of 20
- 40 is 10x better than 30
- 50 is 10x higher than 40 and so on
A score of 60, is about 100x stronger than 40 and 1000x better than a score of 30.
It takes far fewer upvotes to move your score from 25 to 35 than it does to change your score from 62 to 63.