SVG Polyline Question?

OK so this will seem really simplistic to most of you, but how do I create a
polyline in svg to graph the <avg> elements?

<?xml version="1.0" encoding="utf-8" ?>
- <vName>
  3 M COMPANY
- <monthname>
  May
  <avg>93.9</avg>
  </monthname>
- <monthname>
  June
  <avg>92.6</avg>
  </monthname>
- <monthname>
  July
  <avg>95.7</avg>
  </monthname>
- <monthname>
  August
  <avg>96.0</avg>
  </monthname>
  </vName>

Thanks, Kent Seegmiller