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*Relegated100.0*Average seed
Willem II 3 Feyenoord 1 +14.1
-0.2
Sparta 4 Heerenveen 2 -11.0
+0.8
Heracles 0 NAC Breda 1 -0.9
+0.2
Roda JC 4 VVV Venlo 1 -0.7
+0.0
De Graafschap 1 FC Utrecht 1 +0.6
+0.0
NEC Nijmegen 1 Vitesse Arnhem 0 +0.2
PSV Eindhoven 1 Twente 1 +0.1
Excelsior 1 AZ Alkmaar 1 +0.1
Week of 4/20100.0*Relegated100.0*Average seed
Ajax 5 Heracles 1 No
Twente 2 Willem II 0 No
+0.1
VVV Venlo 3 De Graafschap 0 No
+0.2
AZ Alkmaar 1 Sparta 0 -0.1
Points
Chance Will Win Championship