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
Coritiba 1 Santa Cruz 0 +16.5
-0.8
Santa Cruz 2 America-MG 1 -16.1
+1.0
Sport Recife 1 Botafogo-SP 2 +3.6
-0.1
America-MG 1 Bahia 2 -3.2
+0.1
Flamengo 1 Internacional 2 -2.8
+0.1
Sao Paulo 3 Flamengo 1 -1.4
+0.1
Gama 4 Atletico-PR 1 +1.3
-0.1
Portuguesa 1 Cruzeiro 3 +1.0
Botafogo-SP 2 Vitoria 0 +0.9
-0.2
Botafogo 2 Corinthians 4 -0.7
Ponte Preta 1 Juventude 0 -0.7
Juventude 1 Botafogo 3 -0.4
Bahia 2 Gama 1 -0.3
Guarani 1 Parana 0 +0.1
-0.0
Week of 11/24100.0*Serie B100.0*Average seed
Santa Cruz 1 Vitoria 1 +6.8
-0.2
Botafogo-SP 0 Parana 2 -5.6
+0.1
Juventude 2 Gama 1 +3.3
-0.1
Goias 3 America-MG 0 -2.3
+0.1
Sao Caetano 2 Flamengo 0 -1.4
+0.1
Portuguesa 2 Botafogo 1 -0.1
Ponte Preta 2 Sport Recife 1 +0.0
Week of 12/1100.0*Serie B100.0*Average seed
Guarani 1 Santa Cruz 2 -33.5
+1.1
Gama 5 Botafogo-SP 0 -7.3
+0.1
America-MG 1 Juventude 1 -5.1
-0.0
Flamengo 2 Palmeiras 0 +0.7
-0.4
Points
Chance Will Make Playoffs