How are these numbers calculated?

Big Games

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

Week of 10/7100.0*Average seed
Gibraltar 0 Estonia 6 +0.3
Week of 10/8100.0*Average seed
Slovakia 3 Malta 0 -0.5
Iceland 2 Kosovo 0 +0.1
Kazakhstan 1 Armenia 1 -0.1
Macedonia 4 Liechtenstein 0 +0.0
Points
Chance Will Make Playoffs