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 -0.1
Manchester City 2 Arsenal 2 +0.0
Week of 5/15100.0*Average seed
Newcastle United 5 Tottenham Hotspur 1 -0.6
Arsenal 4 Aston Villa 0 -0.0
Points
Chance Will Win Championship