I don't believe it, I was dismissed! :'(
You don't like vector graphics? ???
========= STUPID STRAIGHT LINE EXAMPLE ==========
<html xmlns:v="urn:schemas-microsoft-com:vml">
<head>
<style>
v\:* { behavior: url(#default#VML); }
</style>
</head>
<body>
<v:line from="0,0" to="400,400"></v:line>
</body>
</html>
=================================================
So you could plot your points (with HTML or VML elements) and draw a line of best fit, or join up the dots or whatever.