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*Relegated100.0*Average seed
NAC Breda 0 De Graafschap 1 +10.4
-0.4
FC Volendam 0 FC Groningen 1 -7.3
+0.2
Roda JC 0 Willem II 1 -6.4
+0.3
Heerenveen 2 Den Haag 2 -6.1
+0.3
Sparta 4 Ajax 0 +2.7
-0.2
Vitesse Arnhem 1 Heracles 0 -0.7
+0.1
Week of 5/10100.0*Relegated100.0*Average seed
Den Haag 3 Vitesse Arnhem 1 -40.8
+0.9
De Graafschap 2 FC Volendam 2 -14.4
+0.2
Feyenoord 2 Roda JC 3 -0.3
Heracles 1 FC Utrecht 1 +0.2
Points
Chance Will Win Championship