Fixed curve on scatterplot or line graph

[Liliquestionsxlxs]

I have this Excel graph I want the fixed curve to stay put in a Power BI scatterplot or line graph. I know how to graph the data and I use the slicer tool to change the data, but I want to have this curve fixed as the control limit of the data. I also want the curve to stay fixed even when I select another set of data using the slicer tool.