How are these numbers calculated?

Big Games

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

Week of 2/22100.0*Relegated100.0*Average seed
Motherwell 1 St Mirren 2 -9.8
+0.4
Hamilton Accies 0 Motherwell 0 -1.0
+0.0
Aberdeen 1 Ross County 2 +0.4
-0.2
Week of 3/3100.0*Relegated100.0*Average seed
Rangers 0 Hamilton Accies 1 +4.5
-0.1
Hibernian 1 Hearts 3 +4.3
-0.1
St Mirren 0 St Johnstone 0 -0.9
-0.1
Motherwell 4 Ross County 1 +0.1
Week of 3/7100.0*Relegated100.0*Average seed
St Mirren 1 Hearts 0 No
+1.4
Hamilton Accies 1 Kilmarnock 0 +11.5
-0.2
Celtic 5 St Mirren 0 +2.9
-0.1
Hearts 1 Motherwell 1 +1.1
-0.0
Ross County 0 Rangers 1 +0.1
Points
Chance Will Win Championship