Question

pentagon fghij is reflected across the y - axis to produce pentagon fghij. write the rule for the reflection. (x,y)→(□□)

Explanation:

Step1: Recall reflection rule

When reflecting a point $(x,y)$ across the $y - axis$, the $y$-coordinate remains the same and the sign of the $x$-coordinate changes.

Step2: Write the rule

The rule for reflecting a point $(x,y)$ across the $y - axis$ is $(x,y)\to(-x,y)$.

Answer:

$(x,y)\to(-x,y)$