How are these numbers calculated?

Big Games

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

Week of 4/23100.0*Average seed
Notts County 1 Cambridge 2 -0.6
Crawley 0 Carlisle 1 +0.2
Oxford Utd 2 Hartlepool 0 +0.1
Yeovil 1 Northampton 1 +0.0
Luton 1 Newport 1 +0.0
Week of 4/30100.0*Average seed
Newport 0 Notts County 1 +0.9
Dag & Red 3 Crawley 0 +0.2
Barnet 3 Yeovil 4 -0.2
Hartlepool 0 Portsmouth 2 +0.1
Stevenage 0 Wimbledon 0 +0.1
Exeter 1 Morecambe 1 +0.0
Week of 5/7100.0*Average seed
Notts County 0 Carlisle 5 -0.5
Plymouth 5 Hartlepool 0 +0.3
Yeovil 0 Leyton Orient 1 +0.1
Points
Chance Will Win Championship