PLEASE HELP. will medal and fan.
Use matrices to determine the coordinates of the vertices of the reflected figure. Then graph the pre-image and the image on the same coordinate grid. Triangle RST with vertices R (-3, 7), S (5, 3), and T (6, -5) reflected over the line y=x.

Question

PLEASE HELP. will  medal and fan.
Use matrices to determine the coordinates of the vertices of the reflected figure. Then graph the pre-image and the image on the same coordinate grid. Triangle RST with vertices R (-3, 7), S (5, 3), and T (6, -5) reflected over the line y=x.

anonymous · Answer

this is my answer

ramirocruzo · Answer

The matrix will have to satisfy this property
 ax + by = y
 cx + dy = x 

0x + 1y = y 
1x + 0y = x
$$\left[\begin{matrix}0 & 1 \ 1 & ?\end{matrix}\right]$$

ramirocruzo · Answer

Oops, ?=0

ramirocruzo · Answer

So, coords are R'(7,-3) , S'(3,5) , & T'(-5,6)