How are these numbers calculated?

Big Games

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

Week of 2/6100.0*Libertadores100.0*Average seed
Botafogo 2 Gremio 5 +8.1
+0.6
Atletico-GO 1 Santos 1 +1.1
+0.0
Week of 2/13100.0*Libertadores100.0*Average seed
Gremio 1 Sao Paulo 2 -2.1
-0.6
Flamengo 2 Corinthians 1 +0.6
+0.1
Athletico-PR 2 Atletico-GO 1 -0.6
Santos 2 Coritiba 0 -0.5
Palmeiras 3 Fortaleza 0 -0.1
-0.2
Sao Paulo 1 Palmeiras 1 +0.0
Week of 2/20100.0*Libertadores100.0*Average seed
Gremio 1 Athletico-PR 0 Yes
+0.5
Santos 1 Fluminense 1 +1.3
+0.1
Bragantino 1 Gremio 0 -0.4
Atletico-MG 2 Palmeiras 0 +0.3
Fluminense 2 Fortaleza 0 -0.1
Palmeiras 1 Atletico-GO 1 +0.1
Points
Chance Will Win Championship