Question

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 (-1, 6), S (8, 4), and T (3, 4) reflected over the line y=x.

Answer 1

the matrix will have to satisfy this property

ax + by = y
cx + dy = x

Answer 2

I worked it out, can you check my answers for me?

Answer 3

0x + 1y = y
1x + 0y = x