How are these numbers calculated?

Big Games

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

Week of 10/17None
Week of 10/20100.0*Chance in playoffs100.0*Average seed
Sounders 3 FC Dallas 1 In
+0.1
Whitecaps 0 Timbers 1 -7.7
-0.1
Week of 10/28None
Points
Chance Will Make Playoffs