C. No, the graph fails the vertical line test. I believe that is the answer.
Answer:
<h2>(a) 5</h2><h3>> 5 is greater than 4</h3>
The equation x squared minus 8x+16 represents the data in the graph because if you use the -b/2a x=4. Then if you plug in the 4 for the x in the equation you would come out with the vertex of (4,0). Hope this helps.

So, Option C is the correct answer.
Hope this will help you.
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