How are these numbers calculated?

Big Games

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

Week of 11/12100.0*Average seed
Sampaio Correa 1 Cruzeiro 1 +0.2
Vitoria 3 Cruzeiro 0 +0.2
Vila Nova 2 Vasco da Gama 2 -0.1
Botafogo 2 Operario-PR 1 +0.1
Londrina 2 Ponte Preta 1 +0.1
Nautico 2 Sampaio Correa 1 -0.1
Remo 0 Goias 1 +0.0
Week of 11/19100.0*Average seed
Vasco da Gama 2 Remo 2 -0.2
Vila Nova 2 Londrina 1 -0.1
Nautico 1 Avai 2 +0.1
Cruzeiro 0 Nautico 0 +0.1
Brusque 2 Operario-PR 0 +0.0
Week of 11/26100.0*Average seed
Londrina 3 Vasco da Gama 0 -0.4
Vitoria 0 Vila Nova 1 -0.3
Avai 2 Sampaio Correa 1 +0.2
Goias 2 Brusque 2 +0.2
Points
Chance Will Win Championship