Which of the following best describes the graph below?

A. It is a many-to-one function.
B. It is not a function.
C. It is a function, but it is not one-to-one.
D. It is a one-to-one function.

Question

Which of the following best describes the graph below?



 		A.	It is a many-to-one function.
 		B.	It is not a function.
 		C.	It is a function, but it is not one-to-one.
 		D.	It is a one-to-one function.

jacob902 · Answer

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directrix · Answer

The graph is a circle. 

Is a circle a function.

If you can show that the same x is paired to more than one y-value on the circle, then the circle is not a function.

Draw a vertical line through the circle and see if it picks up more than one point of the circle.

It does. 

The circle is not a function.

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