To determine the median of the distribution, order the data values and calculate the cumulative frequency. This is done by adding the frequencies sequentially.
With a total of \(42\) observations, the median is at the \(\frac{N+1}{2} = \frac{42 + 1}{2} = 21.5\)th position. The cumulative frequency surpassing 21.5 is for \(x = 9\), hence the median is 9.
Therefore, the correct answer is 9.