How are these numbers calculated?

Big Games

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

Week of 11/29100.0*Average seed
Corinthians 1 Bahia 2 -1.1
Criciuma 0 Gremio 2 +0.2
Vasco da Gama 1 Figueirense 0 +0.2
Fortaleza 5 Parana 3 +0.1
Vitoria 1 Coritiba 0 -0.1
Goias 3 Santos 0 -0.1
Internacional 3 Flamengo 1 +0.1
Atletico-PR 3 Guarani 1 -0.0
Week of 12/6100.0*Average seed
Corinthians 1 Parana 1 -0.5
Criciuma 3 Bahia 2 -0.3
Guarani 2 Paysandu 1 -0.3
Goias 0 Figueirense 3 -0.2
Vitoria 0 Atletico-MG 1 +0.2
Atletico-PR 2 Vasco da Gama 2 +0.1
Week of 12/13100.0*Average seed
Gremio 3 Corinthians 0 -1.0
Parana 2 Vitoria 0 +0.1
Paysandu 2 Atletico-PR 2 +0.1
Coritiba 2 Criciuma 0 +0.1
Figueirense 2 Guarani 0 +0.1
Points
Chance Will Win Championship