help with transformation

- anonymous

help with transformation

- katieb

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- anonymous

##### 1 Attachment

- anonymous

let me see your file.

- harsimran_hs4

about the line y = x
because two of the coordinates lie on the line itself and other two are mirror images of each other about the line y = x

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## More answers

- anonymous

okay

- anonymous

what does that mean?

- anonymous

i think D.

- anonymous

im thinking d too

- anonymous

yes because it will rotate due same points on x-axis.

- harsimran_hs4

well D won`t work because rotation by 180 would result in reflection about y axis

- anonymous

then whats the answer?

- terenzreignz

No it doesn't, @harsimran_hs4
Consider rotating the line y=x 180 degrees wrt the origin, you don't get the line y = -x

- anonymous

im thinking d makes sense

- anonymous

well does it?

- terenzreignz

I vote yes :)

- harsimran_hs4

well then tell me what is the reflection of point (-3,1) about line y = x ?

- anonymous

ill notify you if you are correct or not okay?

- terenzreignz

Easier to see that the reflection of the point (3,2) about the line y=x is (2,3) which is not on the parallelogram.

- harsimran_hs4

well point is (-3, 1) not (3, 2) i am considering

- terenzreignz

Well, now that you mention it, the image is (1,-3)

- harsimran_hs4

(-3, -3) and (3,3) lie on the line so after reflection they will also lie on the line and remain where they were and (-3, 1) and (3, -1) interchange their position

- terenzreignz

But if it's to be the reflection with respect to the line y=x, then the image of each and every point must still be on the parallelogram, and the image of (-3,1), which is (1,-3) is not on the parallelogram.

- harsimran_hs4

agreed
my bad!! but how does d come out to be the solution?

- terenzreignz

Because A, B, and C were wrong? lol

- harsimran_hs4

LOL!! expected some good arguments tough

- terenzreignz

I'm really not good at explaining geometric concepts, these things just come to me sorta instinctively :(

- harsimran_hs4

cool got hold of it ......
FINALLY I AGREE D IS RIGHT!!

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