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 +0.1
Belarus 1 Netherlands 3 +0.1
Andorra 0 Portugal 2 +0.0
Faroe Islands 0 Latvia 0 -0.0
Week of 10/8100.0*Average seed
Moldova 0 Austria 1 +0.4
Kazakhstan 1 Armenia 1 -0.2
Slovakia 3 Malta 0 +0.1
Points
Chance Will Make Playoffs