Question

If triangle ABC is reflected across the y-axis, what are the coordinates

of A'?
(4, -5)
(-5, 4)
(-4, 5)
(5, -4)

Answer 1

Answer: Second choice. (-5,4)

Point A is located at (5,4)

To reflect over the y axis, we flip the sign of the x coordinate while keeping the y coordinate the same. The rule is
`(x,y) \to (-x,y)`

So we will have
`(5,4) \to (-5,4)` as the location of A'