How are these numbers calculated?

Big Games

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

Week of 11/18100.0*Serie B**100.0*Average seed
Sport 2 Botafogo 0 +7.0
-0.1
Bahia 1 Ponte Preta 0 -6.5
+0.5
Portuguesa 2 Gremio 2 +0.1
+0.0
Flamengo 1 Palmeiras 1 -0.1
Sao Paulo 2 Nautico 1 +0.1
Week of 11/25100.0*Serie B**100.0*Average seed
Inter 0 Portuguesa 2 +2.9
-0.3
Sport 1 Fluminense 1 -1.0
+0.0
Bahia 1 Nautico 1 +0.2
-0.6
Cruzeiro 2 Coritiba 1 +0.1
Ponte Preta 0 Sao Paulo 0 +0.0
Week of 12/1100.0*Serie B**100.0*Average seed
Atletico-GO 0 Bahia 1 No
+0.8
Nautico 1 Sport 0 No
Portuguesa 0 Ponte Preta 0 +0.1
Coritiba 3 Figueirense 0 -0.1
Points
Chance Will Win Championship