Also, try adding alternate and title text so if your visitor runs into any issue with the image, they will see text instead of an image place holder like a little x in a box.
<img
src="http://www.yourwebsite.com/images/YourImageToShow.jpg"
alt="This words will show instead of image if image is not present for what ever reason"
title="This title will give more information as to what you want your visitor should be focus on. It will be shown when they mouse over. I think it should help on you website's
SEO."
/>