Question

The image of a point is B'(-4, 11). A 180° clockwise rotation was performed to get this image. What were the coordinates of the pre-image?

(-11, -4)
(11, 4)
(4, 11)
(4, -11)

Answer 1

Ok so, here’s how we’re going to look at the “graph”.

Quadrant 2 (-x, y) - Quadrant 1 (x,y)
Quadrant 3 (-x,-y) - Quadrant 4 (x,-y)

Now, the coordinate provide is in Quadrant 2, so a 180 clockwise rotation to get here would make your pre-image (x,-y), which is Quadrant 4.

So from this, your pre-image point would be (4,-11).

Answer 2

tysm! :)

Answer 3

No problem!