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 C100.0*Average seed
Botafogo-SP 1 CSA 3 +3.5
-0.3
Guarani 1 Vitoria 2 +1.5
Figueirense 3 Brasil de Pelotas 0 +1.3
-0.1
CRB 5 Figueirense 1 -1.2
+0.0
Sampaio Correa 2 Parana 1 -1.0
+0.1
Nautico 4 Oeste 1 +0.7
Ponte Preta 2 Nautico 0 -0.7
Parana 0 Cuiaba 2 -0.5
+0.1
America-MG 1 Botafogo-SP 1 +0.5
Vitoria 0 Chapecoense 0 -0.1
Oeste 0 Confianca 1 +0.1
Week of 1/22100.0*Serie C100.0*Average seed
Vitoria 1 Botafogo-SP 0 -0.2
Oeste 1 Parana 0 +0.2
Week of 1/29100.0*Serie C100.0*Average seed
Botafogo-SP 0 Operario-PR 1 -0.2
Parana 0 Cruzeiro 0 +0.1
Points
Chance Will Win Championship