How are these numbers calculated?

Big Games

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

Week of 4/28100.0*Relegated100.0*Average seed
Partick Thistle 1 Ross County 1 -2.3
+0.0
St Johnstone 1 Partick Thistle 1 +2.2
-0.1
Hamilton 2 Ross County 0 -1.7
Motherwell 2 Dundee 1 -1.4
+0.0
Week of 5/5100.0*Relegated100.0*Average seed
Partick Thistle 0 Motherwell 1 +10.6
-0.2
Ross County 0 Dundee 1 -9.4
+0.2
Hamilton 1 St Johnstone 2 -3.5
+0.1
Dundee 1 Hamilton 0 +1.4
Week of 5/12100.0*Relegated100.0*Average seed
Dundee 0 Partick Thistle 1 -13.1
+0.3
St Johnstone 1 Ross County 1 -11.0
+0.2
Motherwell 3 Hamilton 0 -1.3
Points
Chance Will Win Championship