How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 4/6100.0*Average seed
Botafogo-SP 1 Sao Paulo 3 +0.2
Ponte Preta 1 Palmeiras 2 +0.1
U. Barbarense 1 Sao Paulo 2 +0.0
Week of 4/13None
Week of 4/21None
Chance Will Make Playoffs