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 +10.4
-0.1
Palmeiras 0 Atletico-MG 2 +3.1
-0.2
Vitoria 1 Corinthians 1 -2.2
+0.0
Goias 1 Santos 4 -0.2
Week of 11/28100.0*Serie B100.0*Average seed
Avai 3 Santos 2 +11.9
-0.3
Internacional 1 Vitoria 1 -3.3
Flamengo 1 Cruzeiro 2 -1.5
+0.1
Atletico-MG 3 Goias 1 +0.8
-0.1
Guarani 0 Gremio 3 -0.8
+0.1
Atletico-GO 1 Sao Paulo 1 +0.1
+0.0
Week of 12/5100.0*Serie B100.0*Average seed
Vitoria 0 Atletico-GO 0 Yes
-0.8
Atletico-PR 1 Avai 0 +0.2
Santos 0 Flamengo 0 +0.1
Points
Chance Will Win Championship