If you are adding the images in directly using HTML code (through a text widget) then you can add a link to it like this –
<a href="http://link_to_your_page.com"><!--formatted-->
Then add your image code –
<img src="http://link_to_your_image.com"><!--formatted-->
Then close it out with this –
</a><!--formatted-->
So it should look like this in the end –
<a href="http://link_to_your_page.com"><img src="http://link_to_your_image.com"></a><!--formatted-->