How are these numbers calculated?

Big Games

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

Week of 4/13100.0*Average seed
Willem II 3 Feyenoord 1 -0.7
Sparta 4 Heerenveen 2 +0.3
Heracles 0 NAC Breda 1 -0.1
PSV Eindhoven 1 Twente 1 -0.1
Week of 4/20100.0*Average seed
Feyenoord 3 Roda JC 0 +0.3
Twente 2 Willem II 0 -0.2
Heerenveen 5 Excelsior 0 -0.2
Points
Chance Will Win Championship