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
Cruzeiro 2 Operario-PR 1 -2.9
-1.0
Juventude 1 Cruzeiro 0 -1.9
Avai 5 Juventude 2 +1.6
-0.1
CSA 1 Avai 1 +1.1
+0.1
Botafogo-SP 1 CSA 3 -1.0
-0.1
Parana 0 Cuiaba 2 -0.3
Ponte Preta 2 Nautico 0 -0.2
-0.2
Figueirense 3 Brasil de Pelotas 0 +0.1
+0.1
Confianca 0 Sampaio Correa 1 -0.2
Chapecoense 1 Ponte Preta 0 +0.1
Guarani 1 Vitoria 2 +0.1
Sampaio Correa 2 Parana 1 -0.1
CRB 5 Figueirense 1 -0.1
Brasil de Pelotas 0 America-MG 0 +0.0
Week of 1/22100.0*Serie A100.0*Average seed
Juventude 2 Figueirense 1 No
CSA 1 Brasil de Pelotas 1 No
Cuiaba 1 Sampaio Correa 3 -0.1
-0.3
Operario-PR 2 Chapecoense 0 +0.9
Avai 2 Guarani 1 -0.1
Ponte Preta 3 CRB 1 -0.1
Cruzeiro 0 Nautico 0 +0.0
Week of 1/29100.0*Serie A100.0*Average seed
Botafogo-SP 0 Operario-PR 1 +0.8
Figueirense 2 Ponte Preta 7 -0.3
Sampaio Correa 1 Oeste 0 -0.3
America-MG 2 Avai 1 +0.1
Points
Chance Will Win Championship