How are these numbers calculated?

Big Games

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

Week of 4/29100.0*Average seed
Groningen 4 Excelsior 0 -0.9
VVV 1 Roda 4 +0.1
Zwolle 0 Willem II 1 -0.1
Heracles 2 Utrecht 2 +0.0
Week of 5/6100.0*Average seed
Excelsior 1 Ajax 2 -0.7
Willem II 2 Vitesse 2 +0.3
Sparta 2 Heracles 5 -0.2
PSV 0 Groningen 0 -0.1
Utrecht 1 VVV 0 +0.1
Points
Chance Will Win Championship