How are these numbers calculated?

Big Games

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

Week of 9/21100.0*Supporters Shield100.0*Average seed
FC Dallas 1 NYCFC 1 -0.3
+0.0
LAFC 3 Houston 1 No
LAFC 1 Toronto FC 1 +0.1
NYCFC 4 Atlanta 1 +0.1
+0.2
NY Red Bulls 2 Philadelphia 0 +0.1
San Jose 1 Philadelphia 2 -0.1
Atlanta 3 San Jose 1 -0.0
Week of 9/29100.0*Supporters Shield100.0*Average seed
Columbus 2 Philadelphia 0 +0.2
New England 2 NYCFC 0 -0.1
Week of 10/6None
Points
Chance Will Make Playoffs