Answer:
(1, 4).
Step-by-step explanation:
For a counterclockwise rotation of 90 degrees:
(x, y) -----> (-y, x) so:
Y' (4, -1) ------> (1, 4).
the answer would be (-4,1)
i have taken the edgenuity unit test and received a perfect score
3 * 10^4