The equation that represents the relationship in the table is y = x + 2. This can be seen by looking at the table and noticing that the total number of hours the mariachi band is at a concert location is always 2 more than the number of hours they perform. For example, when the mariachi band performs for 1 hour, they are at the concert location for 3 hours. When the mariachi band performs for 2 hours, they are at the concert location for 4 hours. And so on.
Here is a table of the data from the question, along with the equation y = x + 2:
```
Hours performed | Total hours at concert location
------------- | -------------
1 | 3
2 | 4
3 | 5
4 | 6
5 | 7
```
As you can see, the equation y = x + 2 fits the data perfectly.