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*Average seed
Aberdeen 2 Hearts 1 -0.6
Hearts 0 Kilmarnock 1 -0.6
Aberdeen 0 Celtic 3 +0.1
Rangers 1 Hibernian 0 +0.0
Week of 5/11100.0*Average seed
Kilmarnock 1 Hibernian 0 -0.2
Week of 5/18100.0*Average seed
Celtic 2 Hearts 1 -0.5
Motherwell 3 Livingston 2 -0.3
Hamilton Accies 2 St Johnstone 0 +0.3
Points
Chance Will Win Championship