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*Relegated100.0*Average seed
Aldershot 2 Chester 2 -4.5
+0.0
Bournemouth 2 Grimsby 1 +4.2
-0.8
Notts County 0 Dag & Red 3 +0.1
Macclesfield 2 Barnet 1 -0.1
Week of 5/2100.0*Relegated100.0*Average seed
Chester 1 Darlington 2 No
Grimsby 0 Macclesfield 0 No
Points
Chance Will Win Championship