Question

Triangle XYZ is reflected across the y-axis, and X = (4, –5). What are the coordinates of X’ ?

Answer 1

The coordinates of X would be X'(-4, -5).

The equation would be P(x,y) -> P'(-x, y) so you would make the x-coordinate a negative number and keep the y-coordinate the same.

Answer 2

Co-ordinates of X' are (-4,-5).

Explanation:

We are given a triangle XYZ with co-ordinates of X = (4,-5).

Also, it is given that, XYZ is reflected across y-axis.

We know, 'When a figure is reflected across y-axis, the co-ordinates (x,y) changes to (-x,y)'.

So, as XYZ is reflected across y-axis.

We get,

X = (4,-5) changes to X' = (-4,-5)

Hence, the co-ordinates of X' are (-4,-5).