How are these numbers calculated?

Big Games

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

Week of 11/15100.0*Serie B100.0*Average seed
Juventude 1 Botafogo 3 +17.7
-1.4
Ponte Preta 1 Juventude 0 +10.7
-1.3
Coritiba 1 Santa Cruz 0 -3.3
+0.1
Flamengo 1 Internacional 2 -3.3
+0.1
Sao Paulo 3 Flamengo 1 -3.2
+0.1
America-MG 1 Bahia 2 -3.0
+0.1
Sport Recife 1 Botafogo-SP 2 +2.6
-0.1
Gama 4 Atletico-PR 1 +1.2
-0.2
Portuguesa 1 Cruzeiro 3 +1.1
-0.2
Botafogo-SP 2 Vitoria 0 +1.1
Bahia 2 Gama 1 -0.4
+0.1
Botafogo 2 Corinthians 4 -0.2
-0.0
Guarani 1 Parana 0 *+0.1
Santa Cruz 2 America-MG 1 +0.1
Vasco da Gama 2 Gremio 0 -0.1
Sao Caetano 2 Guarani 0 +0.1
Cruzeiro 1 Sao Paulo 4 +0.1
Parana 0 Fluminense 1 +0.1
Week of 11/24100.0*Serie B100.0*Average seed
Juventude 2 Gama 1 -24.8
+1.3
Botafogo-SP 0 Parana 2 -6.6
+0.2
Goias 3 America-MG 0 -5.0
+0.1
Sao Caetano 2 Flamengo 0 -4.3
+0.1
Santa Cruz 1 Vitoria 1 -2.0
+0.1
Palmeiras 2 Cruzeiro 1 +0.1
Portuguesa 2 Botafogo 1 +0.1
Week of 12/1100.0*Serie B100.0*Average seed
Cruzeiro 4 Internacional 2 -0.3
Botafogo 2 Sao Caetano 4 +0.3
Gama 5 Botafogo-SP 0 -0.2
America-MG 1 Juventude 1 +0.2

* A starred number could be exactly 0 or just really small. The simulation did not run long enough to know.

Points
Chance Will Make Playoffs