How are these numbers calculated?

Big Games

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

Week of 1/15100.0*Serie A100.0*Average seed
Avai 5 Juventude 2 +2.2
+1.4
CSA 1 Avai 1 -2.0
-0.2
Juventude 1 Cruzeiro 0 -1.4
+0.0
Botafogo-SP 1 CSA 3 -0.6
-0.0
Figueirense 3 Brasil de Pelotas 0 +0.1
+0.2
Chapecoense 1 Ponte Preta 0 +0.1
+0.1
Cruzeiro 2 Operario-PR 1 +0.1
+0.1
Ponte Preta 2 Nautico 0 -0.1
-0.2
Sampaio Correa 2 Parana 1 -0.1
Confianca 0 Sampaio Correa 1 -0.1
CRB 5 Figueirense 1 -0.1
Guarani 1 Vitoria 2 +0.1
Brasil de Pelotas 0 America-MG 0 +0.0
Week of 1/22100.0*Serie A100.0*Average seed
Avai 2 Guarani 1 +2.9
+1.1
CSA 1 Brasil de Pelotas 1 +1.5
+0.1
Juventude 2 Figueirense 1 -0.8
-0.1
Cuiaba 1 Sampaio Correa 3 -0.3
Operario-PR 2 Chapecoense 0 -0.2
Ponte Preta 3 CRB 1 -0.1
Week of 1/29100.0*Serie A100.0*Average seed
America-MG 2 Avai 1 No
-0.8
Guarani 0 Juventude 1 No
-0.1
Nautico 1 CSA 1 +4.1
+0.1
Figueirense 2 Ponte Preta 7 -0.4
Botafogo-SP 0 Operario-PR 1 -0.4
Sampaio Correa 1 Oeste 0 -0.2
Points
Chance Will Win Championship