c_3 = 1 (slider from -3 to 3, step 1 / 24)
c_2 = 1 (slider from -3 to 3, step 1 / 24)
c_1 = 1 (slider from -3 to 3, step 1 / 24)
c_0 = 1 (slider from -3 to 3, step 1 / 24)
G0 = (-2, 4)
x0: x(G0)
Z0: (x0, 0)
G3 = (4, 3)
x3: x(G3)
U3 = Point(Line[(x3, 0), (x3, 1)])
G2 = (2, 3)
x2: x(G2)
Z2: (x2, 0)
G1 = (0, 2)
x1: x(G1)
Z1: (x1, 0)
U2 = Point(Line[(x2, 0), (x2, 1)])
Z3: (x3, 0)
U1 = Point(Line[(x1, 0), (x1, 1)])
U0 = Point(Line[(x0, 0), (x0, 1)])
ρ_0(x) = c_0
ρ_1(x) = (c_1 * x)
ρ_2(x) = (c_2 * x^(2))
ρ_3(x) = (c_3 * x^(3))
φ(x) = ρ_0(x) + ρ_1(x) + ρ_2(x) + ρ_3(x)