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
Botafogo-SP 1 CSA 3 +21.4
+0.8
Juventude 1 Cruzeiro 0 -9.4
-0.2
Avai 5 Juventude 2 +8.2
+0.0
CSA 1 Avai 1 -5.1
-0.1
Chapecoense 1 Ponte Preta 0 +3.2
+0.1
Cruzeiro 2 Operario-PR 1 +2.3
+0.1
Parana 0 Cuiaba 2 -2.2
-0.1
Ponte Preta 2 Nautico 0 -1.1
-0.1
Figueirense 3 Brasil de Pelotas 0 +0.5
+0.1
Guarani 1 Vitoria 2 +0.4
Confianca 0 Sampaio Correa 1 -0.3
-0.1
Sampaio Correa 2 Parana 1 -0.2
Week of 1/22100.0*Serie A100.0*Average seed
Juventude 2 Figueirense 1 -19.5
-0.2
CSA 1 Brasil de Pelotas 1 -9.7
-0.1
Avai 2 Guarani 1 -2.2
-0.1
Cuiaba 1 Sampaio Correa 3 -1.9
-0.0
Ponte Preta 3 CRB 1 -0.1
Week of 1/29100.0*Serie A100.0*Average seed
Guarani 0 Juventude 1 No
-0.3
Nautico 1 CSA 1 -5.6
+0.1
America-MG 2 Avai 1 +3.5
+0.2
Sampaio Correa 1 Oeste 0 -0.2
Figueirense 2 Ponte Preta 7 -0.1
Points
Chance Will Win Championship