To find the unit rate, we divide the total number of seats by the number of rows.
Given:
- Total seats = 51
- Total rows = 3
Now, calculating the seats per row:
\[ \text{Seats per row} = \frac{\text{Total seats}}{\text{Total rows}} = \frac{51}{3} = 17 \]
So, there are 17 seats per row.