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 -19.0
-0.5
Juventude 1 Cruzeiro 0 +18.2
+0.7
Botafogo-SP 1 CSA 3 -11.1
-0.2
CSA 1 Avai 1 +4.8
+0.1
Parana 0 Cuiaba 2 -1.7
-0.1
Chapecoense 1 Ponte Preta 0 +1.0
+0.1
Ponte Preta 2 Nautico 0 -1.0
Cruzeiro 2 Operario-PR 1 +0.7
+0.1
Figueirense 3 Brasil de Pelotas 0 +0.2
Confianca 0 Sampaio Correa 1 -0.1
Sampaio Correa 2 Parana 1 -0.1
Week of 1/22100.0*Serie A100.0*Average seed
Juventude 2 Figueirense 1 +18.9
+0.5
CSA 1 Brasil de Pelotas 1 +10.9
+0.1
Avai 2 Guarani 1 -1.6
-0.1
Cuiaba 1 Sampaio Correa 3 +0.7
-0.1
Week of 1/29100.0*Serie A100.0*Average seed
Guarani 0 Juventude 1 Yes
+0.6
Nautico 1 CSA 1 +3.4
America-MG 2 Avai 1 +2.8
+0.1
CRB 4 Cuiaba 1 +0.3
Points
Chance Will Win Championship