Question

the point marked in the grid is reflected across y-axis. identify the coordinates of the new point.
(options: (1, -1), (-1, -1), (-1, 1), (1, 1))

Explanation:

Step1: Find original coordinates

The red point is at $(-1, 1)$ (x=-1, y=1).

Step2: Apply y - axis reflection rule

Reflection over y - axis: $(x,y)\to(-x,y)$. So substitute $x = - 1$: $-(-1)=1$, $y = 1$ remains. New coordinates: $(1,1)$.

Answer:

D. (1, 1) (assuming the last option is D, if options are labeled as A: (1,-1), B: (-1,-1), C: (-1,1), D: (1,1))