How are these numbers calculated?

Big Games

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

Week of 5/7100.0*Average seed
Stoke City 3 Arsenal 1 +1.3
Fulham 2 Liverpool 5 +0.2
Wolves 3 West Brom 1 +0.2
Newcastle 2 Birmingham 1 -0.1
Aston Villa 1 Wigan 1 +0.1
Bolton 1 Sunderland 2 -0.1
Everton 2 Man. City 1 -0.0
Week of 5/14100.0*Average seed
Man. City 3 Stoke City 0 -0.4
Birmingham 0 Fulham 2 -0.3
Blackpool 4 Bolton 3 +0.2
Sunderland 1 Wolves 3 +0.2
Arsenal 1 Aston Villa 2 -0.1
Chelsea 2 Newcastle 2 -0.0
Week of 5/22100.0*Average seed
Stoke City 0 Wigan 1 -2.0
Aston Villa 1 Liverpool 0 -0.3
Fulham 2 Arsenal 2 -0.2
Bolton 0 Man. City 2 +0.2
Newcastle 3 West Brom 3 +0.1
West Ham 0 Sunderland 3 -0.1
Points
Chance Will Win Championship