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
Avai 3 Atletico-GO 0 +0.5
+0.1
Palmeiras 0 Atletico-MG 2 +0.4
-0.2
Vitoria 1 Corinthians 1 +0.1
Cruzeiro 3 Vasco da Gama 1 +0.1
Week of 11/28100.0*Serie B100.0*Average seed
Flamengo 1 Cruzeiro 2 +2.6
-0.7
Avai 3 Santos 2 +2.5
-0.3
Atletico-GO 1 Sao Paulo 1 -1.2
+0.1
Internacional 1 Vitoria 1 -1.2
+0.0
Guarani 0 Gremio 3 -0.4
Atletico-MG 3 Goias 1 +0.3
-0.2
Corinthians 2 Vasco da Gama 0 +0.1
Ceara 1 Atletico-PR 1 -0.0
Week of 12/5100.0*Serie B100.0*Average seed
Vitoria 0 Atletico-GO 0 +0.5
Santos 0 Flamengo 0 -0.3
Atletico-PR 1 Avai 0 +0.2
Sao Paulo 4 Atletico-MG 0 +0.2
Vasco da Gama 2 Ceara 0 -0.1
Points
Chance Will Win Championship