Answer:
(-2, 1).
Explanation:
Move (-3, -1) one unit to the right, and you get (-2, -1). Reflect (-2, -1) over the y-axis, and the coordinates will be (-2, 1).
The only thing that changes is the y coordinate. If you had reflected it over the x-axis, the x coordinate would have changed and the y coordinate would have stayed the same.