Question

which answer shows a reflection across the y - axis? a b c d

Explanation:

Step1: Recall reflection rule

When reflecting a point $(x,y)$ across the y - axis, the transformation is $(x,y)\to(-x,y)$. For a shape, all its points follow this rule. We need to visually check which option has the shape flipped across the y - axis.

Step2: Analyze each option

Visually inspect options a, b, c, and d to see which one has the same shape as the original but flipped across the y - axis. Without the actual visual content of the options, we assume we would check if for every point $(x,y)$ on the original shape, the corresponding point on the reflected shape is $(-x,y)$.

Answer:

(Without seeing the actual content of options a, b, c, d, we cannot provide a specific letter - identified answer. But the process to find it is as above. If you can provide more details about the options, a more specific answer can be given.)