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 C100.0*Average seed
Vila Nova 2 Fortaleza 1 No
+1.3
Ipatinga 1 Atletico-GO 0 +0.8
-0.1
Vasco da Gama 2 America-RN 1 -0.8
+0.1
Ponte Preta 1 Bahia 3 +0.7
-0.1
Sao Caetano 0 Juventude 0 -0.2
+0.2
Parana 3 Campinense 0 +0.1
-0.1
ABC 6 Brasiliense 2 +0.1
Figueirense 2 Bragantino 1 +0.1
Portuguesa 1 Duque de Caxias 1 +0.1
Week of 11/21100.0*Serie C100.0*Average seed
Fortaleza 1 Sao Caetano 2 -0.2
Figueirense 1 Duque de Caxias 2 -0.2
Vila Nova 2 Parana 2 -0.2
Bahia 2 Guarani 0 -0.1
Ponte Preta 1 Ceara 2 +0.1
Juventude 1 Atletico-GO 3 +0.1
America-RN 1 Ipatinga 0 +0.0
Bragantino 1 Brasiliense 2 -0.0
Week of 11/27100.0*Serie C100.0*Average seed
Brasiliense 2 Vila Nova 1 -2.0
Atletico-GO 0 Bahia 3 -0.4
Sao Caetano 2 Figueirense 1 -0.2
ABC 0 Bragantino 1 -0.2
Parana 1 Fortaleza 1 -0.1
Points
Chance Will Win Championship