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
Corinthians 2 Atletico-MG 1 +1.9
-0.8
Cruzeiro 1 Atletico-PR 1 -0.9
+0.1
Gremio 1 Ceara 3 +0.4
+0.0
Bahia 0 Palmeiras 2 -0.3
-0.0
Sao Paulo 3 America-MG 1 -0.1
Atletico-GO 0 Flamengo 0 +0.0
Week of 11/27100.0*Serie B100.0*Average seed
America-MG 2 Atletico-PR 1 No
+0.0
Atletico-MG 4 Botafogo 0 No
+0.9
Santos 1 Bahia 1 +0.1
+0.0
Ceara 2 Cruzeiro 2 +0.0
Palmeiras 1 Sao Paulo 0 -0.1
Gremio 2 Atletico-GO 2 +0.1
Week of 12/4100.0*Serie B100.0*Average seed
Cruzeiro 6 Atletico-MG 1 -0.7
Atletico-GO 5 America-MG 1 -0.3
Bahia 2 Ceara 1 -0.2
Internacional 1 Gremio 0 +0.2
Points
Chance Will Win Championship