How are these numbers calculated?

Big Games

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

Week of 4/25100.0*Average seed
Accrington 1 Chesterfield 0 +0.1
Bradford 3 Rotherham 0 -0.1
Week of 5/2100.0*Average seed
Morecambe 0 Bournemouth 4 -0.7
Chesterfield 0 Bradford 2 +0.1
Points
Chance Will Win Championship