осциллограф

import math
"""
Y = [9, 13, 17, 21, 25, 31, 40, 49]
X = [5, 7, 10, 13, 15, 20, 25, 30]
"""
Y = [1, 2, 3, 4, 5, 7, 8, 10]
X = [6, 12, 18, 23, 28, 39, 44, 56]
for i in range(8):
    X[i] *= math.sqrt(2)
"""
res = []

for i in range(8):
    res.append(round(L[i] / (U[i] * math.sqrt(2)), 2))
print(res)
"""
"""
UiLi = 0
U2 = 0
for i in range(8):
    UiLi += U[i] * L[i]
    U2 += U[i] ** 2
d_avg = UiLi / (U2 * math.sqrt(2))
print(d_avg)

d_avg = math.sqrt(1 / 7 * (Ui2 * Li2 - UiLi ** 2) / Ui2 ** 2)
print(d_avg)
"""

x = 0
y = 0
x2 =0
xy = 0
for i in range(8):
    x += X[i]
    y += Y[i]
    xy += X[i] * Y[i]
    x2 += X[i] ** 2
x /= 8
y /= 8
x2 /= 8
xy /= 8
k = (xy - x * y) / (x2 - x ** 2)
b = y - k * x
print(k, b)