1. The problem asks to find the mode of the data set represented by the stem-and-leaf plot. 2. First, list all the numbers from the stem-and-leaf plot: - Stem 0: 8 → 8 - Stem 1: 2, 7, 8, 9 → 12, 17, 18, 19 - Stem 2: 2, 3 → 22, 23 - Stem 3: 1, 5 → 31, 35 - Stem 4: 0 → 40 3. The full data set is: 8, 12, 17, 18, 19, 22, 23, 31, 35, 40 4. The mode is the number(s) that occur most frequently in the data set. 5. Count the frequency of each number: - 8: 1 time - 12: 1 time - 17: 1 time - 18: 1 time - 19: 1 time - 22: 1 time - 23: 1 time - 31: 1 time - 35: 1 time - 40: 1 time 6. Since all numbers occur exactly once, there is no number that appears more than once. 7. Therefore, the data set has no mode. **Final answer:** no mode