a(n) = ((5 * n) + 1) / ((3 * n) - 2)
Liste1 = Sequence((i, a(i)), i, 1, 20)
S_u = Point(yAxis)
S_o = Point(yAxis)
b = OrthogonalLine(S_u, yAxis)
c = OrthogonalLine(S_o, yAxis)