Question

which matrix represents the image of the triangle with vertices at (-2,0), (1,5), and (4,-8) when reflected over the line, y=x?

Answer 1

Hint: reflecting over y = x simply swaps the x and y coordinates

So (-2,0) maps to (0,-2)
and (1,5) maps to (5,1)
etc etc

Answer 2

thank you!

Answer 3

you're welcome