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
Shrewsbury 0 Lincoln City 0 +0.1
Bradford 3 Rotherham 0 +0.1
Exeter City 2 Morecambe 2 -0.0
Week of 5/2100.0*Average seed
Lincoln City 0 Aldershot 2 -0.5
Rotherham 0 Exeter City 1 +0.3
Points
Chance Will Win Championship