# Self-checking graphing system of linear inequalities

**URL:** <https://cl.desmos.com/t/self-checking-graphing-system-of-linear-inequalities/5249>\
**Category:** Questions\
**Tags:** validation, correctness\
**Created:** [November 29, 2023, 11:43pm UTC](https://cl.desmos.com/t/self-checking-graphing-system-of-linear-inequalities/5249 "2023-11-29T23:43:37Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![knmadary](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/knmadary/32/4642_2.png) [@knmadary](https://cl.desmos.com/u/knmadary)\
**Post date:** [November 29, 2023, 11:43pm UTC](https://cl.desmos.com/t/self-checking-graphing-system-of-linear-inequalities/5249/1 "2023-11-29T23:43:37Z")

</div>

I am trying to create an activity for graphing a system of 2 linear inequalities where my students get feedback on multiple parts such as: is the slope correct, is the y-intercept correct, is the shaded region correct.

I tried to merge two activities together and I have been unsuccessful at getting the feedback to work for each part. I’m sure I just have something labeled incorrectly.

[[Graphing Systems of Inequalities Assignment #1 • Activity by Kathryn Madary](https://teacher.desmos.com/activitybuilder/custom/6567bde3aba108d6d3eac4f2)]

Can someone get the feedback on screen 2 to work properly? Screen 1 is one of the examples I trying to merge with more feedback.

---

<div class="post-metadata">

**Author:** ![to-mmy](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/to-mmy/32/4643_2.png) [@to-mmy](https://cl.desmos.com/u/to-mmy)\
**Post date:** [November 30, 2023, 2:29am UTC](https://cl.desmos.com/t/self-checking-graphing-system-of-linear-inequalities/5249/2 "2023-11-30T02:29:20Z")

</div>

> **[\[Copy of\] Graphing Systems of Inequalities Assignment #1 • Activity Builder...](https://teacher.desmos.com/activitybuilder/custom/6567f14287c5b9d3494469b1)**
>
> by Thomas Zhang

I hope this is what you were looking for. If so, your error was in the graph, you were comparing the check value with for example m\_1 when it should have been compared to m\_{1answer}.

As an aside, I would recommend changing the colors of the activity from red and green to be accessible to students who are red-green colorblind.