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
Indy 1 San Antonio 0 +0.3
Atlanta 1 Tampa Bay 1 +0.0
Week of 10/25100.0*Average seed
Ottawa 1 Indy 2 +0.8
Atlanta 0 Carolina 2 +0.3
Cosmos 2 Tampa Bay 2 +0.0
Week of 11/1100.0*Average seed
Tampa Bay 2 Indy 2 -0.1
Ft. Lauderdale 1 Ottawa 1 -0.1
Points
Chance Will Win Championship