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
Corinthians 0 Atletico-PR 0 +3.1
+0.1
Botafogo 1 Ponte Preta 1 -1.4
-0.0
Week of 12/4100.0*Libertadores100.0*Average seed
Gremio 0 Botafogo 1 -0.5
Cruzeiro 3 Corinthians 2 +0.2
Ponte Preta 2 Coritiba 0 -0.2
Chapecoense 0 Atletico-MG 0 +0.2
Points
Chance Will Win Championship