Use the vertical-line test to determine which graph represents a function.

Question

yacoub1993 · Answer

http://prntscr.com/31g3r9 choices A and B http://prntscr.com/31g443 choices C and D

anonymous · Answer

neither A nor B pass the "horizontal line test"

yacoub1993 · Answer

D

zale101 · Answer

D is a vertical line, if there's no vertical lines that intersect the graph then it passes the vertical line test

yacoub1993 · Answer

i have a question 
what would be the difference between C and D

zale101 · Answer

In D, as you can see, there's point intersects at more than one point
in C, there's no points intersecting at more than one point 
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In graph D, when you draw a vertical line, it has two points
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In graph C, when you draw a vertical line, it has only one point intersecting to it