How are these numbers calculated?

Big Games

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

Week of 4/24100.0*Promoted100.0*Average seed
Barnet 0 Rotherham 1 +2.0
+0.7
Cheltenham 1 Aldershot 2 -0.4
-0.2
Port Vale 2 Notts County 1 -0.4
-0.1
Chesterfield 1 Bradford 1 +0.3
+0.1
Lincoln City 1 Bury 0 +0.2
+0.1
Burton 0 Bournemouth 2 -0.2
Northampton 2 Shrewsbury 0 -0.1
Morecambe 1 Dag & Red 0 +0.0
Week of 5/8100.0*Promoted100.0*Average seed
Hereford 3 Rotherham 0 -0.5
Morecambe 1 Aldershot 0 +0.1
Points
Chance Will Win Championship