Calculating with a value pulled from a regression in a graph

Thanks for the help and idea. Here’s the full activity: Logistic Model

I do something similar to what I’m looking for in an earlier slide - I take the natural log of a value from the regression equation and it works perfectly:

This is from slide 9.

The computation I’m looking to fix is on slide 15. I want it to do exactly the same type of thing, but instead of taking the natural log of the value, raise e to that number (well, the negative of that number).