I figured a picture would better describe the problem.

The Lesson I was working on was Transformations of Logarithmic Equations.

Then all of a sudden this questions comes up?

I did the experiment and figured the Toss would equal x, and the Coins would equal y. Then graphed it. Although there's no need to use an xy graph I figured, it's only what we've been working on this whole entire time.

I can't say for sure what equation to use, since the amount of remaining coins after each toss is not a constant.

It sort of resembles this kind of graph, but transformed and no asymptote.

$\displaystyle y=(1/2)^x$

Other than that, I have no idea on what the equation should be.

$\displaystyle y=20(1/2)^{n}$ , representing half-Life phenomenon?