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
FC Volendam 0 FC Groningen 1 +20.7
-0.8
Roda JC 0 Willem II 1 -7.1
+0.3
NAC Breda 0 De Graafschap 1 +7.0
-0.3
Sparta 4 Ajax 0 +2.3
-0.1
Heerenveen 2 Den Haag 2 +1.8
-0.1
Vitesse Arnhem 1 Heracles 0 -0.4
+0.0
Week of 5/10100.0*Relegated100.0*Average seed
Den Haag 3 Vitesse Arnhem 1 +14.8
-0.2
De Graafschap 2 FC Volendam 2 +13.5
-0.4
Feyenoord 2 Roda JC 3 +9.6
-0.5
Ajax 1 Twente 0 -0.1
Points
Chance Will Win Championship