1. **Stating the problem:** We are given a frequency distribution of red blood cell counts in intervals and their corresponding frequencies. The problem is to understand and interpret the data, possibly by visualizing it as a histogram. 2. **Data given:** - Intervals and frequencies: - 3.00-3.49: 1 - 3.50-3.99: 7 - 4.00-4.49: 13 - 4.50-4.99: 18 - 5.00-5.49: 18 - 5.50-5.99: 15 - 6.00-6.49: 9 - 6.50-6.99: 3 3. **Understanding histograms:** A histogram is a graphical representation of data where the x-axis represents intervals (bins) and the y-axis represents frequency (count) of data points in each bin. 4. **Interpreting the data:** - The frequency increases from the first interval to the 4.50-4.99 and 5.00-5.49 intervals, which have the highest frequencies (18 each). - Then the frequency decreases symmetrically towards the higher intervals. 5. **Summary:** The data shows a distribution of red blood cell counts with a peak frequency around 4.5 to 5.5, indicating most counts fall in this range. This matches the description of Histogram A, which shows the frequencies as bars with heights corresponding to the frequencies given. No explicit formula is needed here as this is data interpretation and visualization. **Final answer:** The frequency distribution shows a peak in red blood cell counts between 4.50 and 5.49 with frequencies of 18, and the histogram would reflect this with the tallest bars in these intervals.