How are these numbers calculated?

Big Games

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

Week of 11/24100.0*Average seed
Atletico-MG 4 Goias 1 +1.5
Sport Recife 1 Cruzeiro 0 -0.3
Corinthians 0 Vasco da Gama 1 -0.2
Internacional 2 Palmeiras 1 -0.2
Flamengo 2 Atletico-PR 0 +0.2
Figueirense 2 Nautico 0 -0.1
Sao Paulo 2 Botafogo 2 -0.0
Week of 12/2100.0*Average seed
Palmeiras 1 Atletico-MG 3 +1.9
Atletico-PR 2 Sao Paulo 1 -0.5
Vasco da Gama 3 Parana 0 -0.3
Juventude 2 Sport Recife 1 +0.3
Goias 2 Internacional 1 +0.1
Botafogo 1 Figueirense 1 +0.1
Points
Chance Will Win Championship