How are these numbers calculated?

Big Games

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

Week of 10/24100.0*Average seed
Cruzeiro 3 Palmeiras 1 -0.5
Vasco da Gama 3 Coritiba 1 +0.2
Sao Paulo 1 Corinthians 2 -0.2
Santos 1 Parana 2 +0.1
America-RN 2 Santos 2 +0.1
Sport Recife 2 Botafogo 1 -0.1
Coritiba 1 Atletico-MG 1 +0.0
Portuguesa 1 Internacional 1 +0.0
Week of 10/31100.0*Average seed
Palmeiras 3 Parana 2 +0.8
Vitoria 2 Corinthians 3 -0.2
Santos 3 Goias 1 -0.2
Portuguesa 3 Bragantino 1 -0.2
Atletico-MG 1 Sport Recife 0 +0.1
Week of 11/7100.0*Average seed
Palmeiras 2 Vasco da Gama 1 +0.7
Corinthians 2 America-RN 1 -0.4
America-MG 1 Palmeiras 1 -0.1
Points
Chance Will Make Playoffs