To find the coordinates of the point (5, 8) after a 270-degree counterclockwise rotation about the origin, we can use the rotation rules for the Cartesian plane.
A 270-degree counterclockwise rotation corresponds to a 90-degree clockwise rotation. The transformation for a 90-degree clockwise rotation of the point (x, y) is given by:
\[ (x, y) \rightarrow (y, -x) \]
Applying this to the point (5, 8):
\[ (5, 8) \rightarrow (8, -5) \]
Therefore, the new coordinates after the rotation are (8, -5).
So the correct response is:
(8, -5)