How are these numbers calculated?

Big Games

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

Week of 4/23100.0*Average seed
Atletico-MG 0 Nacional 1 -0.2
Zamora 2 Cerro Porteno 1 -0.2
Week of 5/7100.0*Average seed
Nacional 1 Cerro Porteno 1 +0.4
Points
Chance Will Make Playoffs