f = Function(15 - x, 9, 11)
h = Function(-0.5 x + 10.5, 5, 9)
i = Function(8, -2, 5)
g = Function(10 + x, -6, -2)
f1 = Function(-2 x - 8, -9, -6)
g1 = Function(-7 / 2 x - 21.5, -9, -7)
h1 = Function(2 x + 17, -10, -7)
f2 = Function(5 / 4 x + 9.5, -10, -6)
g2 = Function(-0.5 x - 1, -6, 0)
h2 = Function(-1, 0, 4)
f3 = Function(0.5 x - 3, 4, 10)
g3 = Function(-1 / 2 x + 7, 8, 10)
h3 = Function(1 / 3 x + 1 / 3, 8, 11)
f4 = Function(-2 x + 16, 3, 4)
g4 = Function(10, -1, 3)
h4 = Function(8 - 2 x, -1, 0)
f5 = Function(x - 4, 1, 3)
g5 = Function(2 x - 5, 1, 2)