How are these numbers calculated?

Big Games

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

Week of 11/19100.0*Serie B100.0*Average seed
Gremio 1 Ceara 3 -13.2
+0.7
Cruzeiro 1 Atletico-PR 1 -6.9
+0.1
Bahia 0 Palmeiras 2 -1.5
Sao Paulo 3 America-MG 1 -0.3
+0.1
Corinthians 2 Atletico-MG 1 -0.1
Vasco da Gama 2 Avai 0 +0.0
Week of 11/27100.0*Serie B100.0*Average seed
Ceara 2 Cruzeiro 2 +6.3
-0.2
America-MG 2 Atletico-PR 1 -4.0
+0.2
Santos 1 Bahia 1 +1.5
Week of 12/4100.0*Serie B100.0*Average seed
Bahia 2 Ceara 1 Yes
-0.5
Cruzeiro 6 Atletico-MG 1 Yes
-0.2
Atletico-PR 1 Coritiba 0 +1.4
-0.5
Atletico-GO 5 America-MG 1 +0.1
Points
Chance Will Win Championship