How are these numbers calculated?

Big Games

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

Week of 5/1100.0*Relegated100.0*Average seed
Motherwell 2 Kilmarnock 0 +8.4
-0.2
Dundee Utd 0 Ross County 2 +8.2
-0.2
St Mirren 1 Hamilton Accies 2 +4.1
-0.1
Week of 5/12100.0*Relegated100.0*Average seed
Ross County 2 Hamilton Accies 1 +7.1
-0.1
Kilmarnock 3 St Mirren 3 -2.0
+0.0
Week of 5/15100.0*Relegated100.0*Average seed
Hamilton Accies 0 Kilmarnock 2 -15.0
+0.3
Motherwell 1 Ross County 2 +10.1
-0.2
Points
Chance Will Win Championship