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 -30.8
+0.9
Palmeiras 0 Atletico-MG 2 +4.1
-0.1
Vitoria 1 Corinthians 1 +0.4
Goias 1 Santos 4 -0.2
+0.0
Week of 11/28100.0*Serie B100.0*Average seed
Avai 3 Santos 2 -31.0
+1.2
Internacional 1 Vitoria 1 +2.6
-0.0
Atletico-GO 1 Sao Paulo 1 +1.8
Guarani 0 Gremio 3 -1.5
+0.1
Flamengo 1 Cruzeiro 2 -0.4
+0.1
Atletico-MG 3 Goias 1 +0.2
-0.1
Week of 12/5100.0*Serie B100.0*Average seed
Atletico-PR 1 Avai 0 -0.8
Vitoria 0 Atletico-GO 0 +0.4
Sao Paulo 4 Atletico-MG 0 +0.2
Santos 0 Flamengo 0 -0.1
Vasco da Gama 2 Ceara 0 -0.1
Points
Chance Will Win Championship