Yes it is the right answer. Nice job.
The range is the set of possible y values of a function. All you need to do is list off the y coordinates of the points shown. The points on the graph are
(1,2), (5,1), (6,3), (2,5)
in no particular order.
The y coordinates of those points are: {2, 1, 3, 5} which sorts to {1,2,3,5}
