How are these numbers calculated?

Big Games

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

Week of 11/26100.0*Libertadores100.0*Average seed
Botafogo 1 Ponte Preta 1 -2.3
-0.0
Corinthians 0 Atletico-PR 0 +2.2
Week of 12/11100.0*Libertadores100.0*Average seed
Gremio 0 Botafogo 1 -0.5
Chapecoense 0 Atletico-MG 0 +0.2
Ponte Preta 2 Coritiba 0 -0.2
Cruzeiro 3 Corinthians 2 +0.2
Points
Chance Will Win Championship