How are these numbers calculated?

Big Games

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

Week of 2/6100.0*Serie B100.0*Average seed
Bahia 3 Goias 3 +5.6
-0.2
Week of 2/13100.0*Serie B100.0*Average seed
Vasco da Gama 0 Internacional 2 -7.1
+0.1
Goias 2 Botafogo 0 +4.0
-0.1
Palmeiras 3 Fortaleza 0 -2.4
+0.1
Atletico-MG 1 Bahia 1 -1.3
Week of 2/20100.0*Serie B100.0*Average seed
Fortaleza 0 Bahia 4 -37.2
+0.9
Corinthians 0 Vasco da Gama 0 -3.2
+0.1
Goias 0 Bragantino 0 No
+0.1
Bahia 2 Santos 0 +0.7
Fluminense 2 Fortaleza 0 +0.3
Athletico-PR 2 Sport Recife 0 +0.1
Sport Recife 2 Atletico-MG 3 +0.1
Points
Chance Will Win Championship