How are these numbers calculated?

Big Games

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

Week of 4/29100.0*Average seed
Lamia 2 Giannina 1 -0.8
Xanthi 1 Larissa 0 +0.1
Levadiakos 0 Atromitos 1 +0.1
Panathinaikos 0 PAOK 3 +0.1
Asteras 2 Apollon 1 +0.1
Platanias 1 Panionios 2 -0.1
Week of 5/6100.0*Average seed
Giannina 3 Olympiakos 0 +1.5
Panathinaikos 1 Xanthi 2 +0.5
Larissa 1 Lamia 1 +0.5
Panionios 2 Levadiakos 0 +0.1
Apollon 0 AEK 1 +0.1
Points
Chance Will Make Playoffs