Respuesta :

Answer:

d

Step-by-step explanation:

The function is nonlinear. Linear is a straigt line and this function has a curve. You can find that by thinking of the story or placing it on a graph.

gracelou22

Answer:

d

Step-by-step explanation:

the answer is non-linear because a linear function  would only have the first part not 9x+4  

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