Question

The reflection of the point $(6,8)$ in the line $x=y$ is

• A. $(4,2)$
• B. $(-6,-8)$
• C. $(-8,-10)$
• D. $(8,6)$

Answer 1

Answer: (D)

$(8,6)$

Fundamental fact:

The reflection of any point $(x,y)$ in the line $y=x$ is given by $(y,x)$

or the x and y-coordinate will be exchanged to each other.

Hence reflection of point $(6,8)$ in the line $x=y$ is $(8,6)$