# Create a linear trend line in a chart

**URL:** <https://forum.inductiveautomation.com/t/create-a-linear-trend-line-in-a-chart/9784>\
**Category:** Ignition\
**Created:** [March 9, 2015, 2:18pm UTC](https://forum.inductiveautomation.com/t/create-a-linear-trend-line-in-a-chart/9784 "2015-03-09T14:18:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![flavien](https://avatars.discourse-cdn.com/v4/letter/f/f475e1/32.png) [@flavien](https://forum.inductiveautomation.com/u/flavien)\
**Post date:** [March 9, 2015, 2:18pm UTC](https://forum.inductiveautomation.com/t/create-a-linear-trend-line-in-a-chart/9784/1 "2015-03-09T14:18:08Z")

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Hi,

I want to create a linear trend line (y=ax+b) from a dataset in a chart or an easy chart. Is it possible in Ignition ? How can I do it ?

Thanks,

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**Author:** ![JordanCClark](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jordancclark/32/83362_2.png) [@JordanCClark](https://forum.inductiveautomation.com/u/JordanCClark)\
**Post date:** [March 10, 2015, 9:47am UTC](https://forum.inductiveautomation.com/t/create-a-linear-trend-line-in-a-chart/9784/2 "2015-03-10T09:47:00Z")

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The [Math Extensions for Ignition](https://inductiveautomation.com/forum/viewtopic.php?f=25&t=6688) has a linear regression function.

An extra topic of discussion is [here](https://inductiveautomation.com/forum/viewtopic.php?p=19965).

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**Author:** ![Paullys50](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paullys50/32/3324_2.png) [@Paullys50](https://forum.inductiveautomation.com/u/Paullys50)\
**Post date:** [March 10, 2015, 1:08pm UTC](https://forum.inductiveautomation.com/t/create-a-linear-trend-line-in-a-chart/9784/3 "2015-03-10T13:08:32Z")

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If you use a chart object, under the dateset properties tab set the renderer to XYLine/Shap Renderer and it will plot a linear line from data-point to data-point for the data in you dataset for you . Fairly straight forward, just need to play with the chart object a bit as it’s not that intuitive.  
 ![](https://us1.discourse-cdn.com/inductiveautomation/original/2X/b/b860b128a6e0d622861a40c46e3c09971e6df540.JPG)