Answer
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Answer: yes this is a function
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The reason why is because we don't have any repeated x values. Each input (x) leads to exactly one output (y). If you plotted all the points, then you would not be able to pass a single vertical line through more than one point. So this graph passes the vertical line test.
30000 is the estimate if your estimating by the ten thousand
<h3><u>The correct answer is A and B.</u></h3>
Both A and B represent functions, as the same x value is not used twice.
However, with option C, the x value -2 is used twice, and thus it is not a function.