How are these numbers calculated?

Big Games

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

Week of 12/4100.0*Average seed
Internacional 2 Cruzeiro 0 +0.9
Guarani 2 Figueirense 1 +0.2
Flamengo 0 Coritiba 0 +0.1
Week of 12/11100.0*Average seed
Ponte Preta 1 Internacional 2 +0.9
Figueirense 1 Juventude 0 -0.3
Parana 0 Fluminense 1 -0.2
Coritiba 1 Goias 0 -0.1
Week of 12/19100.0*Average seed
Internacional 2 Parana 1 +0.6
Corinthians 5 Figueirense 2 +0.2
Fluminense 1 Palmeiras 1 +0.1
Points
Chance Will Win Championship