Relationships

Hello BI community,

I'm a fairly new user of PowerBI and relationships are still hard to understand the concept. I need some help.

I have uploaded 5 tables onto PowerBI. All of them have exactly the same column names. They are a large data set of house price indexes across 5 different regions within a county(UK) or estate (USA). Each table contains all data for a region.

My goal is to create a report and dashboard to present to investors. My question: how can I create the relationships for this case? I want to create graphs, tables, etc comparing the regions, or is it not necessary relationships?

Many thanks

Carlos