text: import matplotlib.pyplot as plt 
  import seaborn as sns; sns.set() 
  import numpy as np 
  
  rng = np.random.RandomState(1) 
  print(rng)
  x = 10 * rng.rand(50) 
  y = 2 * x - 5 + rng.randn(50) 
  print(x)
  print(type(x))
  plt.scatter(x, y)
  
  # plt.show()