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
West Brom 1 Tottenham Hotspur 0 +0.1
Brighton & Hove 1 Manchester United 0 -0.1
Week of 5/6100.0*Average seed
West Ham United 0 Manchester United 0 +0.0
Chelsea 1 Liverpool 0 +0.0
Week of 5/13None
Chance Will Win Championship