Question

A little help here~
Trapezoid ABCD is reflected over the line y = x. What rule shows the input and output of the reflection, and what is the new coordinate of A'?

Answer 1

(x,y)→(y,-x); A' is at (1, 5)

(x,y)→(y,x); A' is at (1, -5)

(x,y)→(-x,y); A' is at (5, 1)

(x,y)→(-x,-y); A' is at (5, -1)

Answer 2

There is no sing changing. Just swap x and y.

Answer 3

I'm a little confused but i think its
(x,y)→(-x,y); A' is at (5, 1)

Answer 4

That would be a reflection across x = 0, they-axis.

There is no sign changing. Just swap x and y.