Respuesta :

graph c is a function. the others are not functions because they have points that overlap vertically, and there is not one input for every output.

Answer:

C

Step-by-step explanation:

Graph C is a function because if you look at all of the graphs it is the only one that doesn't repeat a point on the same x-axis. For example, On the first graph, it shows that A has to points that has a coordinate of -2, and the rest show that too, except for C.

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