How are these numbers calculated?

Big Games

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

Week of 10/18100.0*Average seed
Ottawa 0 Edmonton 2 -0.5
Atlanta 1 Tampa Bay 1 +0.0
Week of 10/25100.0*Average seed
Ottawa 1 Indy 2 -0.6
Atlanta 0 Carolina 2 +0.1
Cosmos 2 Tampa Bay 2 -0.0
Week of 11/1100.0*Average seed
Tampa Bay 2 Indy 2 -0.2
Ft. Lauderdale 1 Ottawa 1 +0.1
Points
Chance Will Win Championship