title: Graph point on straight line (number line) in Python
body: <p>Trying to figure out what's the best way to graph a  point on a number line in python. Essentially trying to make something similar to the image below:</p>
  
  <p><img src="https://i.stack.imgur.com/7G4tc.gif" alt="Point on a number line"></p>
  
  <p>I've been trying to use Matplotlib to do this but can't seem to figure it out. Anyone know of a package or anything out there I can use?</p>