A = (1.4000000000000001, 4.0200000000000005)
B = (2.64, 3.14)
C = (3.7, 4.5200000000000005)
D = (4.66, 3.72)
E = (6.58, 2.36)
F = (8.040000000000001, 2.2)
a = FitLineY({A, B, C, D, E, F})