How are these numbers calculated?

Big Games

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

Week of 10/23100.0*Average seed
Parana 4 Atletico-MG 1 -0.2
Portuguesa 2 Flamengo 3 +0.1
Juventude 2 Vasco da Gama 1 -0.1
Ponte Preta 2 Portuguesa 1 +0.1
Vitoria 2 Parana 0 +0.1
Gremio 2 Sport Recife 1 +0.0
Botafogo-SP 2 Internacional 1 +0.0
Week of 10/30100.0*Average seed
Botafogo 3 Gama 1 +1.3
Gremio 0 Corinthians 3 +0.1
Cruzeiro 2 Botafogo-SP 1 +0.1
Parana 1 Sao Paulo 2 +0.1
Week of 11/7100.0*Average seed
Botafogo 1 Guarani 0 +1.4
Internacional 1 Palmeiras 0 -0.5
Gama 2 Portuguesa 1 -0.3
Atletico-MG 2 Gremio 0 +0.2
Cruzeiro 5 Parana 2 +0.2
Ponte Preta 0 Gama 0 +0.1
Flamengo 0 Santos 1 -0.1
Portuguesa 2 Parana 2 -0.0
Coritiba 1 Juventude 1 +0.0
Points
Chance Will Make Playoffs