To determine the dimensions of the matrix \( L \), we look at the number of rows and columns.
The matrix \( L \) is given as:
\[ L = \begin{bmatrix} 1 & 3 \ 5 & 2 \ 9 & 7 \end{bmatrix} \]
This shows that \( L \) has 3 rows and 2 columns.
Thus, the correct description of matrix \( L \) is that it has the dimensions \( 3 \times 2 \).
The correct response is:
Matrix L has the dimensions 3×2.