A graph of a quadratic function y = f(x) is shown below.

We are given a graph of a quadratic function y = f(x) .We need to find the solution set of the given graph of a quadratic function .Note: Solution of a function the values of x-coordinates, where graph cut the x-axis.For the shown graph, we can see that parabola in the graph doesn't cut the x-axis at any point.It cuts only y-axis.Because solution of a graph is only the values of x-coordinates, where graph cut the x-axis. Therefore, there would not by any solution of the quadratic function y = f(x).So, the correct option is 2nd option :∅.