Does this graph represent a function? Why or why not?
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A. No, because it fails the vertical line test.
B. Yes, because it passes the horizontal line test.
C. Yes, because it passes the vertical line test.
D. No, because it is not a straight line.
The vertical line test can be used to test if a relation is a function. If you draw a vertical line through the given graph it only touches one point so it is a function.