1. The problem asks for the mode of the data set: 6, 6, 7, 7, 8, 8, 8, 9. 2. The mode is the value that appears most frequently in a data set. 3. Count the frequency of each number: - 6 appears 2 times - 7 appears 2 times - 8 appears 3 times - 9 appears 1 time 4. Since 8 appears the most times (3 times), the mode is 8. Final answer: The mode is **8**.