How are these numbers calculated?

Big Games

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

Week of 4/3100.0*Average seed
Platanias 3 Xanthi 1 -0.6
Iraklis 0 Asteras 1 +0.1
Iraklis 0 Olympiakos 2 +0.1
Levadiakos 1 Giannina 1 +0.1
Panathinaikos 3 Veria 2 +0.0
Week of 4/10100.0*Average seed
Veria 1 Xanthi 1 -0.3
Panthrakikos 0 Iraklis 3 -0.2
Panetolikos 2 Olympiakos 5 +0.1
Giannina 2 Platanias 0 -0.1
Kalloni 2 Atromitos 4 -0.0
PAOK 2 Levadiakos 0 +0.0
Week of 4/17100.0*Average seed
Xanthi 0 Giannina 1 -0.5
Iraklis 0 Panetolikos 0 -0.0
Points
Chance Will Make Playoffs