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*Chance in playoffs100.0*Average seed
Portland 2 New England 2 -6.8
-0.5
San Jose 1 Philadelphia 2 +6.0
+0.2
Portland 0 Minnesota 0 -4.0
-0.4
FC Dallas 1 NYCFC 1 +1.9
+0.1
Atlanta 3 San Jose 1 +1.6
+0.1
LA Galaxy 2 Montreal 1 -1.4
-0.1
RSL 1 LA Galaxy 2 +0.9
+0.1
Sporting KC 2 Colorado 3 +0.3
New England 0 RSL 0 -0.1
DC United 2 Seattle 0 +0.1
+0.1
Minnesota 2 Sporting KC 1 -0.1
Week of 9/29100.0*Chance in playoffs100.0*Average seed
San Jose 0 Seattle 1 +10.1
+0.1
Colorado 3 FC Dallas 0 +5.5
+0.2
Sporting KC 2 Portland 2 -2.4
-0.2
RSL 2 Houston 1 -0.2
-0.1
Week of 10/6100.0*Chance in playoffs100.0*Average seed
Portland 3 San Jose 1 In
+0.5
FC Dallas 6 Sporting KC 0 -9.5
-0.2
Points
Chance Will Make Playoffs