# Change center of rotation in "Connecting the Dots"

**URL:** <https://cl.desmos.com/t/change-center-of-rotation-in-connecting-the-dots/3753>\
**Category:** Questions\
**Created:** [October 18, 2021, 1:39am UTC](https://cl.desmos.com/t/change-center-of-rotation-in-connecting-the-dots/3753 "2021-10-18T01:39:20Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![rebecca.asr](https://avatars.discourse-cdn.com/v4/letter/r/898d66/32.png) [@rebecca.asr](https://cl.desmos.com/u/rebecca.asr)\
**Post date:** [October 18, 2021, 1:39am UTC](https://cl.desmos.com/t/change-center-of-rotation-in-connecting-the-dots/3753/1 "2021-10-18T01:39:20Z")

</div>

Can anyone help me change the center of rotation on slide 5 of the “Connecting the Dots” activity? [Connecting the Dots • Activity Builder by Desmos](https://teacher.desmos.com/activitybuilder/custom/5d895b60c1fa4c4b47ca7375?collections=featured-collections,5d9386f6383d2d0c53a026b5)

Thank you!

---

<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:** [October 18, 2021, 5:59pm UTC](https://cl.desmos.com/t/change-center-of-rotation-in-connecting-the-dots/3753/2 "2021-10-18T17:59:51Z")

</div>

In the Transformation Functions folder, you’ll see two functions:  
`X_{rot}` and `Y_{rot}`. To make the center of rotation `(a,b)` you want to add `2a` to `X_{rot}` and `2b` to `Y_{rot}`.