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 +4.4
-0.9
Juventude 1 Botafogo 0 -1.4
+0.2
Vitoria 1 Sao Paulo 4 -1.2
+0.1
Criciuma 1 Parana 2 -1.0
-0.0
Atletico-MG 0 Paysandu 0 -0.9
+0.1
Flamengo 0 Coritiba 0 -0.7
+0.1
Guarani 2 Figueirense 1 +0.3
Week of 12/11100.0*Serie B100.0*Average seed
Vasco da Gama 1 Atletico-PR 0 No
+1.8
Cruzeiro 4 Vitoria 0 -1.8
+0.1
Botafogo 1 Corinthians 2 -1.8
+0.2
Gremio 0 Atletico-MG 1 +1.1
-0.1
Paysandu 4 Guarani 2 +0.9
-0.3
Palmeiras 3 Criciuma 2 -0.8
+0.1
Sao Paulo 1 Flamengo 1 -0.1
+0.0
Week of 12/19100.0*Serie B100.0*Average seed
Santos 2 Vasco da Gama 1 -0.6
Juventude 1 Paysandu 2 -0.6
Atletico-MG 3 Sao Caetano 0 +0.5
Internacional 2 Parana 1 +0.2
Flamengo 6 Cruzeiro 2 +0.1
Points
Chance Will Win Championship