How are these numbers calculated?

Big Games

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

Week of 4/27None
Week of 5/3100.0*Down to Championship100.0*Average seed
Chelsea 0 Norwich 0 No
Man United 0 Sunderland 1 +0.1
-0.2
Aston Villa 3 Hull 1 -0.9
Arsenal 1 West Brom 0 +0.1
West Ham 2 Tottenham 0 -0.2
Man United 3 Hull 1 -0.6
Swansea 0 Southampton 1 +0.2
Sunderland 2 West Brom 0 -0.1
Man City 4 Aston Villa 0 +0.0
Week of 5/11100.0*Down to Championship100.0*Average seed
Hull 0 Everton 2 -0.9
West Brom 1 Stoke 2 +0.4
Tottenham 3 Aston Villa 0 +0.1
Sunderland 1 Swansea 3 +0.1
Man City 2 West Ham 0 +0.0
Points
Chance Will Win Championship