How are these numbers calculated?

Big Games

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

Week of 11/14100.0*Serie A100.0*Average seed
Brasiliense 2 Juventude 2 -2.0
-0.2
Gremio Barueri 1 Fortaleza 0 -1.9
-0.1
Corinthians 3 Vila Nova 1 +0.9
+0.1
Bragantino 3 Avai 2 -0.7
-0.2
Parana 1 Ponte Preta 0 +0.5
+0.1
Ceara 2 Santo Andre 3 -0.1
Sao Caetano 2 Juventude 1 -0.7
Sao Caetano 1 America-RN 2 +0.1
Week of 11/21100.0*Serie A100.0*Average seed
Brasiliense 2 Vila Nova 1 +0.1
Bahia 2 Marilia 1 -0.1
ABC 1 Ponte Preta 1 +0.1
Week of 11/28100.0*Serie A100.0*Average seed
Juventude 3 Gremio Barueri 2 +1.1
Vila Nova 2 Bragantino 0 -0.2
Ponte Preta 3 Criciuma 1 -0.2
Gama 0 Bahia 0 +0.1
Avai 2 Sao Caetano 2 -0.0
Points
Chance Will Win Championship