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
FC Utrecht 2 Feyenoord 2 -0.4
NAC Breda 0 De Graafschap 1 +0.3
Vitesse Arnhem 1 Heracles 0 -0.1
Week of 5/10100.0*Average seed
Heracles 1 FC Utrecht 1 -0.5
NEC Nijmegen 1 Sparta 1 +0.4
Feyenoord 2 Roda JC 3 +0.3
Den Haag 3 Vitesse Arnhem 1 +0.3
FC Groningen 1 NAC Breda 0 +0.0
Points
Chance Will Win Championship