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 2 Wigan 3 -0.1
Swansea 0 Man City 0 +0.0
Week of 5/12100.0*Average seed
Norwich 4 West Brom 0 -0.2
Man United 2 Swansea 1 +0.1
Everton 2 West Ham 0 +0.0
Week of 5/19100.0*Average seed
Swansea 0 Fulham 3 +0.4
West Brom 5 Man United 5 -0.1
Points
Chance Will Win Championship