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
Rangers 1 Hibernian 0 +0.2
Hearts 0 Kilmarnock 1 -0.1
Week of 5/11100.0*Average seed
Rangers 2 Celtic 0 +0.0
Week of 5/18None
Points
Chance Will Win Championship