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
Sunderland 0 Swansea City 2 +0.1
Middlesbrough 1 Southampton 2 -0.1
Week of 5/17100.0*Average seed
Arsenal 2 Sunderland 0 +0.0
Points
Chance Will Win Championship