Vincenzo plotted point K in the coordinate plane below. On a coordinate plane, point K is 0.5 units to the right and 0.5 units down.

He says that the plotted point is (Negative one-half, one-half). What is Vincenzo’s error?
The x- and y-coordinates are switched.
Both coordinates should be positive.
The x-coordinate should be One-fourth.
The y-coordinate should be One-fourth.