Help! A Simple Line Chart....Feeling dumber the more i use Tableau

I feel dumber and clumsier each time I use Tableau.

All I want to create is a simple line chart. I can't seem to manage to produce what I want.

I want to produce something like the below (from Excel, yuck) but with the formatting options of Tableau.

I want to develop the facility with the tool to do this painlessly (as I can in Excel) with my preferred tool (Tableau).

I have not been able to suss it out. This has got to be easy. Why can I not figure out how to do it?

I have attached a sample picture and a tab-separated TXT file.

Trend line non zero y-intercept

Greetings,

I need to build (and maintain) a number of statistical charts with trend lines.

It is critical that the trend line intercepts the y-axis at a very specific value, generally 0.5 or 0.75.
Currently the only option is 0 ("Force y-intercept to zero").

Any ideas?

Thanks!

Cesar Kastoun

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