import numpy

import matplotlib.pyplot as plt

numpy.random.seed(2)

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x = numpy.random.normal(3, 1, 100)

y = numpy.random.normal(150, 40, 100) / x

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train_x = x[:80]

train_y = y[:80]

​

test_x = x[80:]

test_y = y[80:]

​

plt.scatter(train_x, train_y)

plt.show()

​