RETAKE Chapter 4, Test #1

Question

What is the image of left bracket, minus, 5, comma, minus, 1, right bracket(−5,−1) after a reflection over the line y, equals, minus, xy=−x?

Answer

Answer 1

We used transformation rules to find the image.

I assume that's what you did, too.

Hopefully you didn't have to whip out a ruler and draw it on graph paper!

Answer 2

Reflecting (x,y) in the line y = -x gives the point (-y, -x).

So, the image of (-5,-1) when reflected in the line y = -x is (1, 5).