Points A(-4,1), B(-1,4) and C(-1,1) are the vertices of triangle ABC. What will be the coordinates of the image of point B if triangle ABC is rotated 90 degrees clockwise about the origin?
90° clockwise rotation rule (about the origin) for a point
(x , y) → (y, -x)
Swap x and y......change the sign on x
Can you take it from here ???