How are these numbers calculated?

Big Games

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

Week of 11/13100.0*Average seed
Portuguesa 1 Duque de Caxias 1 -0.1
Vasco da Gama 2 America-RN 1 +0.0
Parana 3 Campinense 0 -0.2
ABC 6 Brasiliense 2 +0.2
Vila Nova 2 Fortaleza 1 -0.2
Figueirense 2 Bragantino 1 +0.1
Sao Caetano 0 Juventude 0 +0.1
Ponte Preta 1 Bahia 3 -0.0
Week of 11/21100.0*Average seed
Figueirense 1 Duque de Caxias 2 +1.6
Fortaleza 1 Sao Caetano 2 -0.2
Bahia 2 Guarani 0 -0.2
Bragantino 1 Brasiliense 2 -0.1
Vila Nova 2 Parana 2 +0.1
Juventude 1 Atletico-GO 3 +0.1
Ponte Preta 1 Ceara 2 +0.0
America-RN 1 Ipatinga 0 +0.0
Week of 11/27100.0*Average seed
Duque de Caxias 4 Ponte Preta 1 +1.9
Sao Caetano 2 Figueirense 1 -0.4
Atletico-GO 0 Bahia 3 -0.3
ABC 0 Bragantino 1 -0.2
Parana 1 Fortaleza 1 +0.2
Points
Chance Will Win Championship