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
Switzerland 5 Hungary 2 +1.4
Andorra 0 Portugal 2 +0.4
Gibraltar 0 Estonia 6 -0.1
Faroe Islands 0 Latvia 0 -0.0
Week of 10/8100.0*Average seed
Hungary 1 Faroe Islands 0 -3.2
Points
Chance Will Make Playoffs