title: Python: How to find the slope of a graph drawn using matplotlib?
body: <p>Here is my code:</p>
  
  <pre><code>import matplotlib.pyplot as plt
  plt.loglog(length,time,'--')
  </code></pre>
  
  <p>where length and time are lists.</p>
  
  <p>How do I find the slope of this graph?</p>