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
Juventude 1 Botafogo 0 +13.1
-1.0
Criciuma 1 Parana 2 -3.0
+0.0
Vitoria 1 Sao Paulo 4 -2.0
+0.1
Guarani 2 Figueirense 1 +1.3
Atletico-MG 0 Paysandu 0 -1.0
+0.1
Corinthians 3 Vasco da Gama 1 -0.5
+0.1
Flamengo 0 Coritiba 0 +0.4
+0.0
Internacional 2 Cruzeiro 0 +0.1
Week of 12/11100.0*Serie B100.0*Average seed
Botafogo 1 Corinthians 2 +21.0
-1.0
Cruzeiro 4 Vitoria 0 -6.2
+0.2
Gremio 0 Atletico-MG 1 +5.9
-0.2
Palmeiras 3 Criciuma 2 -4.9
+0.2
Paysandu 4 Guarani 2 -1.7
-0.1
Sao Paulo 1 Flamengo 1 +1.6
-0.0
Vasco da Gama 1 Atletico-PR 0 +0.3
-0.2
Week of 12/19100.0*Serie B100.0*Average seed
Atletico-MG 3 Sao Caetano 0 +15.8
-0.4
Atletico-PR 1 Botafogo 1 -12.9
+0.1
Vitoria 1 Ponte Preta 2 -10.7
+0.2
Criciuma 3 Coritiba 3 +9.2
-0.1
Flamengo 6 Cruzeiro 2 -0.1
Points
Chance Will Win Championship