It seems that you have missed the necessary options to answer this question, but anyway, hope my answer helps. The question that you ask when understanding the problem would be this: "<span>what do I want to find out?"
Since the problem seeks for an answer, this would be the correct question. Hope this helps.</span>
For a linear function: The graph is a straight line
For a non-linear function: The graph is not a straight line
The given graph is not a straight line and is rather a curve with several turning points i.e several ups and downs. Hence the graph belongs to a Non-Linear Function.
A relation is non-function when it passes through same x value more than once. Since this cannot be observed in the given graph, the graph belongs to a function.
Therefore, the correct answer to this question is "Non-Linear Function"
