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
Portuguesa 1 Duque de Caxias 1 -4.9
-0.1
Ipatinga 1 Atletico-GO 0 +1.7
Figueirense 2 Bragantino 1 -0.7
-0.2
Ceara 2 Guarani 2 -0.1
Week of 11/21100.0*Serie A100.0*Average seed
Vasco da Gama 0 Portuguesa 1 +7.4
+0.3
Juventude 1 Atletico-GO 3 -3.1
Figueirense 1 Duque de Caxias 2 +1.8
+0.2
Ponte Preta 1 Ceara 2 -1.1
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