How are these numbers calculated?

Big Games

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

Week of 5/3100.0*Average seed
Sparta 4 Ajax 0 -0.4
Twente 3 AZ Alkmaar 0 -0.2
PSV Eindhoven 1 NEC Nijmegen 1 +0.1
Week of 5/10100.0*Average seed
Willem II 0 PSV Eindhoven 3 -0.2
Ajax 1 Twente 0 +0.1
Points
Chance Will Win Championship