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*Average seed
NYCFC 4 Atlanta 1 -0.2
San Jose 1 Philadelphia 2 -0.2
Atlanta 3 San Jose 1 +0.2
NY Red Bulls 2 Philadelphia 0 +0.1
FC Dallas 1 NYCFC 1 -0.0
Week of 9/29100.0*Average seed
Columbus 2 Philadelphia 0 +0.2
Montreal 1 Atlanta 1 -0.0
Week of 10/6100.0*Average seed
Atlanta 3 New England 1 +0.2
Philadelphia 1 NYCFC 2 +0.2
Points
Chance Will Make Playoffs