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
Santa Cruz 2 America-MG 1 +19.4
-1.3
America-MG 1 Bahia 2 +14.5
-0.8
Flamengo 1 Internacional 0 +7.0
-0.3
Sport Recife 1 Botafogo-SP 2 +4.5
-0.2
Coritiba 1 Santa Cruz 0 -3.8
+0.1
Sao Paulo 3 Flamengo 1 -3.3
+0.1
Botafogo-SP 2 Vitoria 0 +2.4
-0.1
Gama 4 Atletico-PR 1 +2.1
-0.1
Portuguesa 1 Cruzeiro 3 +1.5
-0.2
Ponte Preta 1 Juventude 0 -0.8
+0.1
Botafogo 2 Corinthians 4 -0.8
Bahia 2 Gama 1 -0.7
+0.1
Juventude 1 Botafogo 3 +0.6
-0.1
Vasco da Gama 2 Gremio 0 -0.1
Cruzeiro 1 Sao Paulo 4 +0.0
Sao Caetano 2 Guarani 0 +0.0
Week of 11/24None
Week of 12/1100.0*Serie B100.0*Average seed
America-MG 1 Juventude 1 Yes
-0.1
Flamengo 2 Palmeiras 0 Yes
-0.2
Gama 5 Botafogo-SP 0 -7.6
+0.2
Guarani 1 Santa Cruz 2 +1.7
-0.4
Points
Chance Will Make Playoffs