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 +6.9
-0.2
Zwolle 2 Heerenveen 1 No
+1.0
Roda 1 Willem II 0 +6.0
-0.3
NEC 2 AZ 1 +2.0
-0.1
Excelsior 3 Feyenoord 0 -0.2
Heracles 4 ADO 0 +0.0
Week of 5/14100.0*Relegated100.0*Average seed
ADO 4 Excelsior 1 -0.4
PSV 4 Zwolle 1 -0.2
Vitesse 3 Roda 0 +0.1
Willem II 1 Ajax 3 +0.0
Points
Chance Will Win Championship