Question

9 of 109 of 10 Items
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Question


Which graph is an example of a function?
Responses
A AA
B BB
C CC
D DD
E None of the graphs are a function.None of the graphs are a function.
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Answer 1

I can’t see the graphs you’re choosing from. To tell which graph is a function, use the vertical‑line test:

- Draw (or imagine) vertical lines at every x-value.
- If any vertical line intersects the graph more than once, that graph is NOT a function (because one x gives multiple y’s).
- If every vertical line meets the graph at most once, it IS a function.

Common quick checks:
- Straight non‑vertical lines and standard upward/downward parabolas (y = x^2) are functions.
- Circles, sideways parabolas (x = y^2), and graphs that loop or have multiple y’s for one x are not functions.

If you upload the image or describe each graph (e.g., “circle centered at origin,” “parabola opening up,” “vertical line at x=2,” etc.), I’ll tell you which option is the function.