Question

(8, -1) is reflected over the line y = x. What are the coordinates of the image?

Answer 1

(-1,8)

Answer 2

(-8, -1)
(-1, 8)
(1, -8)
(-8, 1)

Answer 3

thank you

Answer 4

find the eqn of perpendicular line from (8,-1) falling on y=x.
Let the point of intersection of perpendicular and y=x be (a,b)
Use distance formula to find the distance between (8,-1) and (a,b)
Now use mid- point formula to find the image co-ordinates