How are these numbers calculated?

Big Games

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

Week of 5/7100.0*Relegated100.0*Average seed
Sparta 1 Twente 0 -24.4
+0.6
Roda 1 Willem II 0 +11.4
-0.2
Zwolle 2 Heerenveen 1 +3.3
-0.1
NEC 2 AZ 1 -0.5
-0.3
Ajax 4 G.A. Eagles 0 -0.1
Week of 5/14100.0*Relegated100.0*Average seed
G.A. Eagles 1 Sparta 3 -33.1
+0.6
Vitesse 3 Roda 0 -10.0
+0.1
Heerenveen 0 NEC 2 -6.5
-0.4
Points
Chance Will Win Championship