How are these numbers calculated?

Big Games

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

Week of 5/8None
Week of 5/15100.0*Relegated100.0*Average seed
Bedford LFC 2 Old Actonians 1 -11.9
+0.1
Old Actonians 2 Bedford LFC 1 Yes
-0.0
Week of 5/22None
Points
Chance Will Win Championship