Answer:
D
Explanation:
A
if the x-axis is the "mirror", then everything above the x-axis ends up below the x-axis with the same distances from x- and y-axis. and vice versa.
so, the y-value goes from y to -y. but the x-value stays the same, because nothing changed regarding the distance and left-right position from the y-axis.
B
if the y-axis is the "mirror", then everything right of the y-axis ends up left of the y-axis with the same distances from x- and y-axis. and vice versa.
so, the x-value goes from x to -x. but the y-value stays the same, because nothing changed regarding the distance and the above-below position from the x-axis.
C
this line is just going diagonally in 45° inclination from the bottom left to the top right (and passing through the origin, of course).
yes, everything you mirror around it, will simply go upside down, and the coordinates will trade places.
D
this should create a line perpendicular to the line in C, going diagonally with an inclination of -45° from top left to the bottom right.
as in C this makes the coordinates trade places, but it will not change its signs.