Respuesta :

mhanifa

Answer:

  • 1, 3, 4- yes, 2- no

Step-by-step explanation:

#1

  • Yes, it is function
  • x-values are unique and each has one corresponding y-value

#2

  • No, it is not a function
  • x-values are repeated with different y-value: (13, 4) and (13, -4)

#3

  • Yes, it is a function
  • If you put a vertical line, there will always be one intersection with the graph

#4

  • Yes, it is a function
  • This will produce a parabola which is a graph of a normal function with unique x-values and corresponding y-values

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