How are these numbers calculated?

Big Games

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

Week of 10/13None
Week of 10/21100.0*Supporters Shield100.0*Average seed
Philadelphia 0 NY Red Bulls 1 -24.7
-0.2
Atlanta 2 Chicago 1 +15.5
+0.2
Week of 10/28100.0*Supporters Shield100.0*Average seed
Toronto FC 4 Atlanta 1 -36.1
-0.4
NY Red Bulls 1 Orlando 0 -15.7
-0.2
Points
Chance Will Make Playoffs