Trend line with correlation value

[Syndicate_Admin]

Dear colleagues,

I have a problem with a calculation I have to do and I can't find a way.

Do you know how to get the function that defines the trend line?

Would it be possible to automatically obtain the correlation value of this with the data? Similar to the options offered by Excel.

Do you have any idea how to perform this calculation?

Thanks in advance and greetings.