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*Serie A100.0*Average seed
Figueirense 2 Bragantino 1 +12.2
+0.4
Ipatinga 1 Atletico-GO 0 +4.8
+0.1
Ceara 2 Guarani 2 -0.9
Portuguesa 1 Duque de Caxias 1 +0.3
+0.0
Ponte Preta 1 Bahia 3 +0.0
Week of 11/21100.0*Serie A100.0*Average seed
Figueirense 1 Duque de Caxias 2 -20.0
-0.4
Juventude 1 Atletico-GO 3 -16.5
-0.2
Vasco da Gama 0 Portuguesa 1 -2.4
-0.2
Ponte Preta 1 Ceara 2 -2.3
-0.1
Bahia 2 Guarani 0 +0.3
Week of 11/27100.0*Serie A100.0*Average seed
Sao Caetano 2 Figueirense 1 -0.3
Portuguesa 1 Campinense 1 +0.1
Points
Chance Will Win Championship