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*Average seed
Aberdeen 1 Ross County 2 +0.1
Celtic 3 Kilmarnock 1 +0.1
St Johnstone 2 Rangers 2 +0.0
Hibernian 1 Livingston 1 -0.0
Week of 3/3100.0*Average seed
Hibernian 1 Hearts 3 +0.2
Motherwell 4 Ross County 1 -0.1
Livingston 2 Celtic 2 -0.1
Kilmarnock 2 Aberdeen 2 -0.0
Week of 3/7100.0*Average seed
St Johnstone 1 Livingston 0 -0.3
Points
Chance Will Win Championship