# your code goes here
import matplotlib.pyplot as plt
 
def plot_line(coefs):
    """
    рисует разделяющую прямую, соответствующую весам, переданным в coefs = (weights, bias), 
    где weights - ndarray формы (2, 1), bias - число
    """
    w, bias = coefs
    a, b = - w[0][0] / w[1][0], - bias / w[1][0]
    xx = np.linspace(*plt.xlim())
    line.set_data(xx, a*xx + b)# your code goes here

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