How are these numbers calculated?

Big Games

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

Week of 5/13100.0*Average seed
Manchester City 2 Leicester City 1 -0.5
Middlesbrough 1 Southampton 2 -0.2
West Ham 0 Liverpool 4 +0.1
Stoke City 1 Arsenal 4 +0.1
West Brom 0 Chelsea 1 +0.1
Bournemouth 2 Burnley 1 -0.0
Everton 1 Watford 0 +0.0
Week of 5/17100.0*Average seed
Leicester City 1 Bournemouth 1 -0.5
Leicester City 1 Tottenham Hotspur 6 -0.3
Southampton 0 Stoke City 1 -0.3
Burnley 1 West Ham 2 -0.3
Swansea City 2 West Brom 1 +0.2
Manchester United 2 Crystal Palace 0 +0.1
Manchester City 3 West Brom 1 +0.1
Southampton 0 Manchester United 0 -0.0
Chelsea 4 Watford 3 +0.0
Watford 0 Manchester City 5 +0.0
Points
Chance Will Win Championship