Hi,
You are asked to perform a composition of transformations.
It is important to remember to start from the rightmost transformation.
First you have to Rotate 90 and then reflect
The rule to Rotate the point (-1,-2) by 90degrees is
(x,y) -> (-y,-x)
(-1,-2) -> (2,1)
Next you have to reflect this point (2,1) about the line y=x
The rule for reflecting a point about the line y=x is
(x,y)-> (y,x)
(2,1) -> (1,2)
The image of the given point (-1,-2) after the transformation would be (1,2)
Hope this helps!
