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*Average seed
Coventry 2 Watford 3 -1.8
Blackpool 1 Nottm Forest 1 +0.1
Doncaster 2 Crystal Palace 0 -0.1
Derby 1 Charlton 0 -0.1
Bristol City 1 Sheff Wed 1 -0.1
QPR 0 Plymouth 0 -0.0
Week of 5/3100.0*Average seed
Swansea City 0 Blackpool 1 -0.6
Ipswich 2 Coventry 1 -0.3
Plymouth 1 Barnsley 2 +0.2
Crystal Palace 0 Sheff United 0 -0.1
Watford 3 Derby 1 -0.0
Points
Chance Will Win Championship