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
Sunderland 3 Everton 0 -0.8
Leicester City 3 Everton 1 -0.3
Norwich City 4 Watford 2 +0.2
West Ham 1 Swansea City 4 -0.2
Sunderland 3 Chelsea 2 +0.1
Liverpool 2 Watford 0 +0.1
Crystal Palace 2 Stoke City 1 +0.1
Liverpool 1 Chelsea 1 -0.0
Week of 5/15100.0*Average seed
Everton 3 Norwich City 0 +0.6
Swansea City 1 Manchester City 1 +0.1
Watford 2 Sunderland 2 +0.1
West Brom 1 Liverpool 1 +0.0
Southampton 4 Crystal Palace 1 +0.0
Manchester United 3 Bournemouth 1 +0.0
Points
Chance Will Win Championship