# Taking input as f(x) into graphing calculator

**URL:** <https://cl.desmos.com/t/taking-input-as-f-x-into-graphing-calculator/4126>\
**Category:** Questions\
**Created:** [March 7, 2022, 2:53pm UTC](https://cl.desmos.com/t/taking-input-as-f-x-into-graphing-calculator/4126 "2022-03-07T14:53:32Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![calql8r](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/calql8r/32/3224_2.png) [@calql8r](https://cl.desmos.com/u/calql8r)\
**Post date:** [March 7, 2022, 2:53pm UTC](https://cl.desmos.com/t/taking-input-as-f-x-into-graphing-calculator/4126/1 "2022-03-07T14:53:32Z")

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I am having trouble with slide 4 on my activity [Graphs of Logarithms - Lesson 17 Day 2 • Activity Builder by Desmos](https://teacher.desmos.com/activitybuilder/custom/62260df9b84f320a8552ee2c)

I want the students to be able to input f(x) = 5^x. The way I have it set up is so close to working. If I use y = as the initial text, it works. Later in the activity, they will be graphing f(x) and g(x) and comparing, so I don’t want to use y=notation.  
I have tried using x, f. I’ve tried parsing into left and right sides. I just don’t understand it well enough to figure out how to fix it. Any help is appreciated!

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**Author:** ![SteinSchreiber](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/steinschreiber/32/2267_2.png) [@SteinSchreiber](https://cl.desmos.com/u/SteinSchreiber)\
**Post date:** [March 7, 2022, 4:12pm UTC](https://cl.desmos.com/t/taking-input-as-f-x-into-graphing-calculator/4126/2 "2022-03-07T16:12:58Z")

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Not sure if this is what you are looking for but here you go.  
I prefer to parse the equation and then just use the right hand side (rhs).

> **[\[Copy of\] Graphs of Logarithms - Lesson 17 Day 2 • Activity Builder by Desmos](https://teacher.desmos.com/activitybuilder/custom/62262d74a2aa041db5664666)**
>
> Based on math medic Algebra 2 Unit 5 Lessons 2 and 6