Respuesta :

Answer:

B

Step-by-step explanation:

Because there are 2 different y values for the x value of 5.  All x values can only have 1 y value.

For B, there are y points on the x value of 5, so this fails the vertical line test, and is therefore not a function

I believe the correct answer is D. This is because when you match up the function, x is always similar to y.

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