please solve this question with example................

This means that the function has same value, ‘y’ at about x=2.

x=2 is a vertical, so a point on f(x) will have a mirror image about x=2 if it is equidistant from x=2. i.e. a point at x=0(at a distance of 2 units from x=2) will have same value of f(x) as a point at x=4.
From the above by putting the values, you can come to a conclusion for your answer.