How are these numbers calculated?

Big Games

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

Week of 5/4100.0*Relegated100.0*Average seed
Dundee 0 Hamilton 1 -8.5
+0.2
Motherwell 1 St Mirren 1 -3.5
+0.1
Week of 5/11100.0*Relegated100.0*Average seed
St Mirren 2 Hamilton 0 +10.3
-0.2
Week of 5/18100.0*Relegated100.0*Average seed
Hamilton 2 St Johnstone 0 No
+0.3
Dundee 2 St Mirren 3 +14.9
-0.3
Points
Chance Will Win Championship