title: Finding increasing trend in Pandas
body: <p>Given a set of (time-series) data, how to interpret the data in such a way that it is increasing/decreasing, not steady, unchanged, etc. </p>
  
  <pre><code>Year  Revenue
  1993     0.85
  1994     0.99
  1995     1.01
  1996     1.12
  1997     1.25
  1998     1.36
  1999     1.28
  2000     1.44
  </code></pre>