Checking an expression in terms of "n" not x

Questions
1

I am sure I’ve seen something on this, but my brain is just not clicking on it. Wanting students to enter an expression where x=f(n) and then check it using the calculator.

https://teacher.desmos.com/activitybuilder/custom/6061c56181a5bf0d1352197a

2

A couple of graph calculation errors. Rewrite your functions v, w and your values D, d as follows:
image

3

Thanks that worked! Also realized I had swapped my thinking on which input V was and which was W! Will have to adjust it so students can enter formulas in either locations.