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
Tottenham Hotspur 1 Southampton 2 +0.7
Liverpool 2 Watford 0 -0.2
West Ham 3 Manchester United 2 -0.2
Liverpool 1 Chelsea 1 +0.1
West Ham 1 Swansea City 4 +0.1
Norwich City 0 Manchester United 1 -0.0
Week of 5/15100.0*Average seed
Southampton 4 Crystal Palace 1 +0.5
Stoke City 2 West Ham 1 +0.3
West Brom 1 Liverpool 1 +0.1
Manchester United 3 Bournemouth 1 -0.1
Points
Chance Will Win Championship