Excel Graphing Calculator

I have been working for quite a while on an excel graphing calculator and am finally done. it is not nearly as powerful as desmos, or other graphing utilities. for example all equations have to be in y= format, and it cannot do anything too complex such as x factorial. (compare to desmos), but it is great for exponential equations, and includes a user-defined SIGMA function, which I designed myself with help from this forum, because i couldn't find an equivalent anywhere else. for more help, click the ? in the first userform that pops up.

What is your question?

i dont have a question i want to show off my new worksheet/utility, is this the wrong forum?

I'll move it to the tips and tricks section.

Thank you,

Here is version 2, it is the same, except you can now zoom in and out, instead of simply using the logarithmic scales.
Any comments and/or feedback are welcome.