# How do I find an exponential model of the form y = ae^(kt) on a TI-84?

I don't think you can make a model with the $e$ or the two $k$ and the $t$. However, you can make a $y = a {b}^{x}$ model using the Exponential Regression key. To use this, go to STAT$\to$CALC$\to$and scroll down until you see "ExpReg".