How are these numbers calculated?

Big Games

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

Week of 10/20100.0*Average seed
Toronto 29 Winnipeg 28 -0.7
Week of 10/27100.0*Average seed
Ottawa 41 Hamilton 36 +0.3
Week of 11/3100.0*Average seed
BC 13 Toronto 40 -1.0
Games Above .500
Chance Will Make Playoffs