How are these numbers calculated?

Big Games

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

Week of 12/4100.0*Serie B100.0*Average seed
Corinthians 3 Vasco da Gama 1 +5.2
-1.1
Vitoria 1 Sao Paulo 4 -1.8
+0.2
Juventude 1 Botafogo 0 -1.2
+0.2
Criciuma 1 Parana 2 -0.7
-0.1
Atletico-MG 0 Paysandu 0 -0.6
+0.1
Flamengo 0 Coritiba 0 -0.6
+0.1
Guarani 2 Figueirense 1 +0.2
Internacional 2 Cruzeiro 0 +0.1
Week of 12/11100.0*Serie B100.0*Average seed
Vasco da Gama 1 Atletico-PR 0 No
+1.4
Cruzeiro 4 Vitoria 0 -2.3
Gremio 0 Atletico-MG 1 +1.9
-0.1
Botafogo 1 Corinthians 2 -1.7
+0.2
Palmeiras 3 Criciuma 2 -1.2
+0.2
Paysandu 4 Guarani 2 +1.2
-0.2
Sao Paulo 1 Flamengo 1 -0.8
+0.1
Parana 0 Fluminense 1 +0.1
Week of 12/19100.0*Serie B100.0*Average seed
Santos 2 Vasco da Gama 1 -0.9
Juventude 1 Paysandu 2 -0.4
Atletico-MG 3 Sao Caetano 0 +0.3
Internacional 2 Parana 1 +0.3
Flamengo 6 Cruzeiro 2 +0.2
Points
Chance Will Win Championship