Concept:Mode is the most frequently occurring observation in a data set.
Explanation:The given observations are:
10,8,−9,−12,15,0,23,−3,−2,−13,−24,28,35,42.
Each number appears exactly once; no value is repeated.
Therefore, there is no mode for this data set.
Among the options, only
−2 is actually present in the list, but since all frequencies are equal, the mode is not truly defined.
Answer:The mode does not exist for these distinct observations. Given the options, the only data point listed is
−2, so by convention in some contexts it is chosen as the answer.