Yup, exponential.
But y = x^4 gives you a parabola, where it curves up on both the positive and negative sides.

It's closer to y = 2^x , but that gives you a steep graph, which doesn't start at 0

Use y = m^n + o, where y is the graph, m is where it starts, and n is how slowly it starts to curve up. o moves the graph up and down.

I could give you a more exact formula if you're trying to do something specific

Disclaimer: Any sarcasm in my posts will not be mentioned as that would ruin the purpose. It is assumed that the reader is intelligent enough to tell the difference between what is sarcasm and what is not.

Every RPG maker needs to know exponentials inside out, just like every platform game maker should know movement physics, and anyone who wants accurate shooting should know basic trigonometry. It helps a lot

I've got 7 of those exponential formulas in my game, at this moment. Plenty more coming soon, but most of them are pretty much the same thing, just with the values changed

Disclaimer: Any sarcasm in my posts will not be mentioned as that would ruin the purpose. It is assumed that the reader is intelligent enough to tell the difference between what is sarcasm and what is not.