How are these numbers calculated?

Big Games

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

Week of 11/18100.0*Average seed
Fluminense 0 Cruzeiro 2 +1.7
Bahia 1 Ponte Preta 0 +0.1
Sao Paulo 2 Nautico 1 +0.1
Flamengo 1 Palmeiras 1 +0.1
Week of 11/25100.0*Average seed
Cruzeiro 2 Coritiba 1 +0.9
Inter 0 Portuguesa 2 +0.3
Ponte Preta 0 Sao Paulo 0 +0.0
Bahia 1 Nautico 1 +0.0
Week of 12/1100.0*Average seed
Atletico-MG 3 Cruzeiro 2 -0.7
Santos 3 Palmeiras 1 -0.2
Gremio 0 Inter 0 +0.1
Fluminense 1 Vasco 2 -0.1
Flamengo 2 Botafogo 2 +0.0
Points
Chance Will Win Championship