Showing/hiding a row in the previous instance of a table section

I have built a table with a repeatable table section so that users can add additional sections to the table as needed. In one of the rows, I want to have a button that will hide a specific row in the previous instance of the table section. Is there a way to specifically identify the previous section? I have no idea how I would write that in Javascript.

Thanks for any help that you can offer.