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
Juventude 2 Vasco da Gama 1 +0.6
Portuguesa 2 Flamengo 3 +0.1
Ponte Preta 2 Portuguesa 1 +0.1
Parana 4 Atletico-MG 1 -0.1
Botafogo-SP 2 Internacional 1 -0.1
Gremio 2 Sport Recife 1 +0.1
Week of 10/30100.0*Average seed
Sport Recife 0 Juventude 1 +1.2
Cruzeiro 2 Botafogo-SP 1 +0.1
Botafogo 3 Gama 1 -0.1
Parana 1 Internacional 0 +0.1
Gremio 0 Corinthians 3 +0.0
Week of 11/7100.0*Average seed
Juventude 3 Flamengo 1 +1.1
Coritiba 1 Juventude 1 -0.5
Portuguesa 2 Parana 2 +0.2
Atletico-PR 3 Sport Recife 1 +0.2
Gama 2 Portuguesa 1 +0.2
Vasco da Gama 1 Botafogo-SP 1 +0.1
Internacional 1 Palmeiras 0 -0.1
Sport Recife 1 Vitoria 1 +0.1
Points
Chance Will Make Playoffs