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
America-MG 3 Avai 0 -10.4
-0.6
Avai 2 Portuguesa 0 +7.8
+0.7
Boa Esporte 1 Joinville 0 -5.1
-0.2
Sampaio Correa 3 Boa Esporte 0 +4.5
+0.1
ABC 1 Ceara 0 +3.5
+0.1
Atletico-GO 1 Bragantino 0 -2.5
-0.1
Bragantino 2 Santa Cruz 1 +2.1
+0.1
Luverdense 1 America-MG 2 -1.8
-0.2
Ceara 2 Vasco da Gama 0 -1.4
-0.1
Santa Cruz 0 Sampaio Correa 2 +0.6
+0.1
Vasco da Gama 3 Vila Nova 1 -0.6
-0.0
Oeste 2 Nautico 0 +0.0
Week of 11/21None
Week of 11/29100.0*Serie A100.0*Average seed
Avai 1 Vasco da Gama 0 +21.6
+1.0
Icasa 3 Boa Esporte 2 +13.4
+0.4
Atletico-GO 2 Santa Cruz 3 +12.3
+0.4
America-MG 4 Sampaio Correa 0 -0.8
-0.2
Luverdense 1 Ceara 0 +0.3
+0.2
Points
Chance Will Win Championship