A = (0, -4.528532885183242)
B = (18.2, -4.528532885183242)
C = (0.2482179868420712, 0.6550688423262977)
D = (0.4669247253999672, 1.6861148955278058)
E = (1.1230449410736552, 3.092086786257135)
F = (4.372402199648111, 2.99835532687518)
G = (6.6844448644030106, 2.842136227905254)
H = (2.7789673901548677, 3.279549705021046)
I = (5.40344825284962, 2.842136227905254)
J = (8.184148214514297, 2.8733800476992393)
K = (9.331032433739546, 2.8726544319748957)
L = (11.480319891001816, 2.637576116336833)
M = (13.075494175688657, 3.477141529329914)
N = (13.864685663902147, 3.477141529329914)
O = (14.788207618194528, 3.6450546119285305)
P = (16, 4)
Q = (17.338587414151945, 3.5607440831669117)
R = (17.49480651312187, 1.7173587153217909)
S = (17.463562693327884, 0.6550688423262977)
f = Fit({C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S}, {1, x, x^(2), x^(3), x^(4), x^(5), x^(6), x^(7), x^(8)})
text1: "f(x)= \; " + (LaTeX[f]) + ""
V: (π * Integral[(f(x))^(2), 0, 18])
V_{ligikaudne}: round(V)
text2: "V= π \int_{0}^{18}{f(x)^2dx }= \; " + (LaTeX[V]) + "≈" + (LaTeX[V_{ligikaudne}]) + ""