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
Juventude 1 Botafogo 0 +0.4
Corinthians 3 Vasco da Gama 1 -0.1
Goias 0 Palmeiras 0 +0.0
Week of 12/11100.0*Average seed
Figueirense 1 Juventude 0 -0.4
Coritiba 1 Goias 0 +0.2
Botafogo 1 Corinthians 2 -0.1
Palmeiras 3 Criciuma 2 -0.0
Week of 12/19100.0*Average seed
Juventude 1 Paysandu 2 -0.7
Corinthians 5 Figueirense 2 -0.4
Goias 2 Sao Paulo 0 -0.3
Points
Chance Will Win Championship