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 +4.8
-0.2
Week of 2/13100.0*Serie B100.0*Average seed
Goias 2 Botafogo 0 -7.1
+0.3
Vasco da Gama 0 Internacional 2 -4.2
+0.1
Atletico-MG 1 Bahia 1 -1.6
+0.0
Palmeiras 3 Fortaleza 0 -0.9
Santos 2 Coritiba 0 -0.1
+0.1
Week of 2/20100.0*Serie B100.0*Average seed
Goias 0 Bragantino 0 Yes
-0.3
Fortaleza 0 Bahia 4 +8.6
-0.1
Corinthians 0 Vasco da Gama 0 +0.1
Vasco da Gama 3 Goias 2 -0.4
Coritiba 0 Ceara 2 +0.0
Points
Chance Will Win Championship