# How do I find instantaneous velocity on a calculator?

First, type in your position function. I will use $f \left(x\right) = {x}^{2} - 3 x$ as an example here. Here are the exact key strokes:
Let us find the instantaneous velocity at $x = 4$.
Hence, the instantaneous velocity at $x = 5$ is $5$ (at the bottom of the screen).