ExplanationRemember that mode means the number that appears “most often.” Plug In the Answers. For choice (C), if x = 4, then the numbers become: 8, 9, 10, 13, 16.
For a list of numbers to have a mode, there has to be at least two of one of the numbers. So this list has no mode; eliminate choice (C). For choice (A), if x = 2, then the numbers become: 4, 7, 4, 3, 8.
Because 4 appears twice, 4 is the mode—the answer is choice A.
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