new_contents: # 15-1. Cubes
  
  import matplotlib.pyplot as plt
  
  def plot_cubes(min_x, max_x):
  	"""Plots the cube of range of numbers"""
  	x_values = list(range(min_x, max_x))
  	y_values = [x**3 for x in x_values]
  
  	plt.scatter(x_values, y_values, s = 40)
  	plt.show()
  
  start_x = 1
  stop_x = 6
  plot_cubes(start_x, stop_x)
  
  start_x = 1
  stop_x = 5001
  plot_cubes(start_x, stop_x)
  
subject: Add solution to exercise 15.1.