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 +12.1
-0.2
Bahia 1 Ponte Preta 0 +2.1
-0.2
Portuguesa 2 Gremio 2 -1.8
-0.1
Flamengo 1 Palmeiras 1 -0.1
Week of 11/25100.0*Serie B**100.0*Average seed
Inter 0 Portuguesa 2 -23.5
+0.9
Sport 1 Fluminense 1 +1.6
-0.0
Bahia 1 Nautico 1 -0.8
+0.1
Ponte Preta 0 Sao Paulo 0 -0.0
Week of 12/1100.0*Serie B**100.0*Average seed
Nautico 1 Sport 0 No
-0.0
Portuguesa 0 Ponte Preta 0 No
-0.4
Atletico-GO 0 Bahia 1 +1.6
-0.3
Coritiba 3 Figueirense 0 -0.2
Points
Chance Will Win Championship