Image - Relationship maths

This is the image I found the easiest to come up with ideas for... An equation to go with the equation in the article.
These are the images I used to base my vector images on...

I wanted to play around with original facebook imagery which is widely known and recognised.

This was my final resolution, playing around with the opacities to make it fit well and make the actual facebook 'F' a bit more subtle...

This is it in context...

Following the crit... the only thing that I need to change about this resolution is how it fits into the circle given...

This is my revised image. I created a new background, a circle rather than a square which looks a lot more appropriate in context.