How are these numbers calculated?

Big Games

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

Week of 11/21100.0*Serie B100.0*Average seed
Palmeiras 0 Atletico-MG 2 -12.2
+1.0
Avai 3 Atletico-GO 0 +5.4
-0.0
Vitoria 1 Corinthians 1 +0.7
-0.0
Goias 1 Santos 4 -0.3
Week of 11/28100.0*Serie B100.0*Average seed
Avai 3 Santos 2 +2.0
-0.2
Atletico-MG 3 Goias 1 No
+0.8
Atletico-GO 1 Sao Paulo 1 -1.0
+0.1
Internacional 1 Vitoria 1 -0.7
+0.0
Guarani 0 Gremio 3 -0.3
Flamengo 1 Cruzeiro 2 -0.1
+0.2
Corinthians 2 Vasco da Gama 0 +0.1
Week of 12/5100.0*Serie B100.0*Average seed
Sao Paulo 4 Atletico-MG 0 -0.9
Vasco da Gama 2 Ceara 0 -0.2
Santos 0 Flamengo 0 +0.1
Atletico-PR 1 Avai 0 +0.1
Points
Chance Will Win Championship