B2 = 2
B3 = 5
B4 = 5
B5 = 7
B6 = 8
A2 = 1.5
A3 = 3
A4 = 6
A5 = 7
A6 = 10
P_1: (A2, B2)
P_2: (A3, B3)
P_3: (A4, B4)
P_4: (A5, B5)
P_5: (A6, B6)
Liste1: {P_1, P_2, P_3, P_4, P_5}
li: {P_1, P_2, P_3, P_4, P_5}
a = FitLineY(Liste1)
b = false