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*Promoted100.0*Average seed
Darlington 1 Brentford 3 -3.6
-0.6
Notts County 0 Dag & Red 3 -1.6
-0.1
Exeter City 2 Morecambe 2 -0.4
Shrewsbury 0 Lincoln City 0 +0.3
+0.0
Gillingham 0 Bury 0 +0.1
+0.1
Luton 1 Rochdale 1 -0.1
+0.0
Week of 5/2100.0*Promoted100.0*Average seed
Chester 1 Darlington 2 +10.8
+1.0
Dag & Red 1 Shrewsbury 2 +1.4
+0.1
Rochdale 0 Gillingham 1 +1.4
+0.2
Points
Chance Will Win Championship