Which of these graphs represents a function?
A)
B)
C)
D)
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OpenStudy (anonymous):
Directrix (directrix):
@Esi7023
Each x value of a function may be paired with exactly one y value for that x.
So, you can use the vertical line test on the graphs to determine which is a function.
If you pass a vertical line through the graph and the vertical line intersects 2 points of the graph, then that means one x value has been paired with 2 different y values for that x.
Look at the attachment and see which graph has only one point of intersection with the vertical lines drawn.
OpenStudy (anonymous):
b
Directrix (directrix):
No.
I did a bad job of drawing the vertical lines. The vertical line through the circle picks up two points.
Look again at the red vertical line this time.
Directrix (directrix):
@Esi7023
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OpenStudy (anonymous):
ok
Directrix (directrix):
So, the answer is what?
OpenStudy (anonymous):
c
Directrix (directrix):
Correct.
OpenStudy (anonymous):
thxs:)
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