# Lock points after submission

**URL:** <https://cl.desmos.com/t/lock-points-after-submission/3208>\
**Category:** Questions\
**Created:** [April 29, 2021, 7:19pm UTC](https://cl.desmos.com/t/lock-points-after-submission/3208 "2021-04-29T19:19:17Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Frances\_Janowiak](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/frances_janowiak/32/1410_2.png) [@Frances\_Janowiak](https://cl.desmos.com/u/Frances_Janowiak)\
**Post date:** [April 29, 2021, 7:19pm UTC](https://cl.desmos.com/t/lock-points-after-submission/3208/1 "2021-04-29T19:19:17Z")

</div>

I am hoping someone can help me. I would like to lock the points in place after a student places them and submits. Is this possible? If so, how do I do it? I want students and myself to be able to see their work but not be able to change their response once they submit.

> **[Systems of Quadratic and Linear Equations • Activity Builder by Desmos](https://teacher.desmos.com/activitybuilder/custom/608afadb39078619e31fe667)**
>
> by Frances Janowiak

---

<div class="post-metadata">

**Author:** ![sergeballif](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/sergeballif/32/231_2.png) [@sergeballif](https://cl.desmos.com/u/sergeballif)\
**Post date:** [April 29, 2021, 8:26pm UTC](https://cl.desmos.com/t/lock-points-after-submission/3208/2 "2021-04-29T20:26:54Z")

</div>

One way I can think of is to shift the point off the screen once they have submitted. For example, you can assign `number("p"): b5.pressCount` to your graph. Then the point `(w,s)` could be assigned `(w+20p,s)`. That point will be off screen after they submit their answer. If you want a point to replace it, you could add another point at `(w,s{p>0})` and make it static so it only shows up when they have submitted.

---

<div class="post-metadata">

**Author:** ![Daniel\_Grubbs](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/daniel_grubbs/32/719_2.png) [@Daniel\_Grubbs](https://cl.desmos.com/u/Daniel_Grubbs)\
**Post date:** [April 29, 2021, 10:04pm UTC](https://cl.desmos.com/t/lock-points-after-submission/3208/3 "2021-04-29T22:04:13Z")

</div>

Make your movable point, A, using sliders. Make a second immovable point using same sliders. Make a number, say n, in the CL linked to the submit press count. Use that to conditionally display the movable point.

```auto
A=(x1,y1 {n=0}) (Drag should be on)
B=(x1,y1) (Drag should be off)

```

Graph CL:

```auto
number(`n`): button.pressCount

```