According to the given data we have the following:
point c (9,4) is rotated 270 degrees counterclockwise about the origin.
To find the coordinates of point c (9,4) after a 270° counterclockwise rotation about the origin, we would have to multiply the x-coordinate by -1 and then interchange the x- and y-coordinates.
Therefore, the coordinates of the point c would be (4,-9)
coordinates of the point c= (4,-9)