How are these numbers calculated?

Big Games

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

Week of 11/23100.0*Average seed
Internacional 0 Fluminense 2 +0.2
Week of 11/30100.0*Average seed
Coritiba 0 Vasco da Gama 2 -0.7
Internacional 1 Cruzeiro 0 -0.3
Botafogo 1 Figueirense 3 +0.1
Portuguesa 2 Sport Recife 2 +0.1
Vitoria 0 Palmeiras 0 +0.0
Flamengo 3 Goias 3 +0.0
Week of 12/7100.0*Average seed
Sport Recife 4 Coritiba 3 -0.8
Goias 0 Sao Paulo 1 +0.3
Palmeiras 0 Botafogo 1 -0.2
Figueirense 3 Internacional 1 +0.2
Points
Chance Will Win Championship