If you plug x-coordinate in x then solve for y, and what you get for y matches t-coordinate, then this is correct ordered pair.
For explain: (-2, -1)
Plug in x-coordinate; f(-2) = 3 - 2(-2) = 3+4 = 7
-1 isn't equals to 7, so (-2, -1) is not right order pair.
Doing that thing and you should get:
Answer: (-1, 5), (0, 3), (2, -1)
