Question

what are the coordinates of point ( b ) after ( \triangle abc ) is reflected across the ( y )-axis? ( b(square, ?) )

Explanation:

Step1: Recall the reflection rule

When a point \((x,y)\) is reflected across the \(y -\)axis, the rule is \((x,y)\to(-x,y)\).

Step2: Apply the rule to point \(B\)

Given point \(B(3,2)\), here \(x = 3\) and \(y=2\). Using the rule \((x,y)\to(-x,y)\), we substitute \(x = 3\) into \(-x\). So \(-x=-3\) and \(y = 2\) remains the same.

Answer:

\((-3,2)\)