title: scatter plotting multiple columns from dataframe
body: <p>I have this DataFrame</p>
  
  <pre><code>StudentID  Name       Assignment1 Assignment2 Assignment3.. Assignment'n'
  0    s1    user1           7           7           -3
  1    s2    user2           2          10           10
  2    s3    user3          12          10           10
  3    s4    user4           4           2           10
  4    s5    user5          -3           7            2
  </code></pre>
  
  <p>And I need to scatter plot the <code>Assignment1,...,Assignment'n'</code> values.</p>
  
  <p>On the plot the <code>x axis = Assignment1,...,Assignment'n'</code> and <code>y axis=[-3,0,2,4,7,10,12]</code>, which are the values on Assignment's columns. </p>
  
  <p>I'm pretty lost, so I would like to know if anyone has a hint on how to solve this?</p>