Which is the image of (2, 3) under reflection across the y- axis

Question

Answer with work please

Answer 1

When you reflect across the Y-axis, the X coordinate changes sign whereas the Y coordinate stays the same. Thus the reflection of (2, 3) across the Y-axis is (-2, 3).

 

Answer 2

When you reflect across the y-axis,

 

(x,y) → (-x,y)

 

(2,3) → (-2,3)