title: Drawing curved lines in canvas
body: <p>Is it possible to draw curved lines in canvas by their equations? If so, how? Let's say that I have math equation y=0,5*x^2 , how to print equation's graph?</p>
  
  <p>I tried using <code>bezierCurveTo</code> and <code>quadraticCurveTo</code> methods unsuccessfully.</p>