How are these numbers calculated?

Big Games

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

Week of 4/26100.0*Average seed
Oldham 2 Cheltenham 1 +0.6
Tranmere 1 Southend 0 -0.2
Port Vale 2 Northampton 2 +0.1
Bristol Rovers 0 Brighton 2 -0.1
Gillingham 1 Swindon 1 +0.0
Huddersfield 2 Walsall 0 -0.0
Swansea City 4 Leyton Orient 1 +0.0
Week of 5/3100.0*Average seed
Crewe 1 Oldham 4 +1.2
Luton 0 Huddersfield 1 -0.5
Walsall 2 Hartlepool 2 +0.3
Northampton 2 Tranmere 1 -0.1
Points
Chance Will Win Championship