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
Sport Recife 1 Botafogo-SP 2 +2.1
-0.4
Flamengo 1 Internacional 0 +0.8
-0.1
America-MG 1 Bahia 2 -0.5
Coritiba 1 Santa Cruz 0 -0.4
+0.1
Santa Cruz 2 America-MG 1 -0.3
-0.1
Sao Paulo 3 Flamengo 1 -0.3
+0.0
Portuguesa 1 Cruzeiro 3 +0.2
Botafogo 2 Corinthians 4 -0.1
Ponte Preta 1 Juventude 0 -0.1
Gama 4 Atletico-PR 1 +0.1
Juventude 1 Botafogo 3 +0.1
Botafogo-SP 2 Vitoria 0 +0.1
-0.2
Week of 11/24None
Week of 12/1None
Points
Chance Will Make Playoffs