A nice article, clearly written but...

"There's an equation which gives the exact relationship." Yes indeed. So why not say what it is? This is supposed to be a Maths page isn't it?

## Where's the maths?

A nice article, clearly written but...

"There's an equation which gives the exact relationship." Yes indeed. So why not say what it is? This is supposed to be a Maths page isn't it?