To reflect the point \((-2, 1)\) horizontally, we need to take the \(y\)-coordinate and negate it, while the \(x\)-coordinate remains unchanged.
The original point is \((-2, 1)\).
- The \(x\)-coordinate is \(-2\).
- The \(y\)-coordinate becomes \(-1\) after the reflection.
Therefore, the point \((-2, 1)\) after horizontal reflection becomes \((-2, -1)\).
So, the correct response is: In the horizontal reflection, the point (−2,1) becomes (−2,−1).