broken link in Home page …

I have a link at the bottom of my home page, I’m not sure where it came from and need to remove it. it’s referring to a picture which should not be there (Slides S2 Home) ; how can I track where this is getting feed from? which file contains this code? this is the page.
http://www.ideagraphicdesign.com

I know this is the piece of code, but where is it in my files ?

<img class=”alignnone size-full wp-image-53″ alt=”Slides s2 Home” src=”…/Slides-s2.jpg” width=”950″ height=”390″ title=”Home”></p>
</div>