I need a process (1) is the right answer
Thx~

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}

for ex: the reciprocal of 3/4 is 4/3. it is the opposite.

reciprocal definition:

a mathematical expression or function so related to another that their product is one; the quantity obtained by dividing the number one by a given quantity.