How are these numbers calculated?

Big Games

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

Week of 4/13100.0*Average seed
Portsmouth 2 Crystal Palace 1 -0.4
Crystal Palace 1 Ipswich 1 -0.3
Coventry 0 Millwall 1 -0.1
Leeds United 4 Peterborough 1 -0.1
Blackpool 1 Leeds United 0 +0.0
Cardiff 2 Derby 0 +0.0
Watford 1 Hull 1 +0.0
Week of 4/21100.0*Average seed
Ipswich 0 Millwall 3 -0.2
Reading 2 Crystal Palace 2 -0.0
Week of 4/28100.0*Average seed
Crystal Palace 1 Cardiff 2 -0.5
Doncaster 2 Ipswich 3 -0.2
Points
Chance Will Win Championship