Point A is the original point before rotating. A’ after A(4,1) is rotated 90 degrees counterclockwise: B, C, D, F, G, or H?
To rotate a point 90 degrees counterclockwise, we can switch the x and y coordinates and negate the new x-coordinate.
Starting with point A(4,1), we switch the x and y coordinates to get A’(1,4). Then we negate the new x-coordinate to get A’(-1,4).
Therefore, the point A’ after rotating A(4,1) 90 degrees counterclockwise is H.