Question

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

Explanation:

Step1: Recall reflection rule

A reflection across the y - axis changes the sign of the x - coordinate while keeping the y - coordinate the same.

Step2: Write the rule

For a point $(x,y)$ reflected across the y - axis, the new point is $(-x,y)$.

Answer:

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