How are these numbers calculated?

Big Games

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

Week of 4/27100.0*Average seed
Crystal Palace 0 Man City 2 +0.0
Week of 5/3100.0*Average seed
Swansea 0 Southampton 1 -0.6
West Ham 2 Tottenham 0 -0.1
Arsenal 1 West Brom 0 +0.1
Man United 3 Hull 1 +0.1
Aston Villa 3 Hull 1 +0.1
Man United 0 Sunderland 1 -0.1
Man City 4 Aston Villa 0 +0.1
Stoke 4 Fulham 1 -0.0
Sunderland 2 West Brom 0 -0.0
Week of 5/11100.0*Average seed
Sunderland 1 Swansea 3 +1.0
Tottenham 3 Aston Villa 0 +0.1
Hull 0 Everton 2 +0.1
Man City 2 West Ham 0 +0.1
Points
Chance Will Win Championship