How are these numbers calculated?

Big Games

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

Week of 5/24100.0*Average seed
Edmonton 1 Atlanta 2 -1.1
Tampa Bay 3 Ft. Lauderdale 2 -0.3
Ottawa 2 San Antonio 3 +0.1
Cosmos 1 Indy 1 -0.0
Minnesota 0 Carolina 0 -0.0
Week of 5/31100.0*Average seed
Ottawa 1 Edmonton 0 -0.4
Indy 1 San Antonio 2 +0.2
Week of 6/7100.0*Average seed
Atlanta 3 Indy 3 +0.2
Points
Chance Will Win Championship