Answer:
J
Step-by-step explanation:
Consider tha graph of the function [tex]y=2^x[/tex] This graph shows exponential dependence, not linear, so it is nonlinear graph.
If we take only some points which belong to this graph, then we'll have discrete function, not continuous (you can see an example of such function in attached diagram )
So, this function is descrete, nonlinear.