How are these numbers calculated?

Big Games

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

Week of 10/11100.0*Average seed
Houston 2 Kansas City 1 +0.1
Portland 4 DC United 0 -0.1
Week of 10/15100.0*Average seed
Vancouver 1 San Jose 1 -0.5
Seattle 4 Dallas 0 -0.1
Kansas City 0 Houston 0 +0.1
Week of 10/22100.0*Average seed
Portland 2 Vancouver 1 -0.7
Seattle 3 Colorado 0 -0.2
Points
Chance Will Make Playoffs