A line segment has endpoints (1, 1) and (4, 4). Demonstrating the properties of
reflections across the y-axis, what are the reflected endpoints? (1 point)
When a point is reflected across the y-axis, the x-coordinate changes sign while the y-coordinate remains the same.
The first endpoint is (1, 1). When reflected across the y-axis, the x-coordinate changes sign, so it becomes (-1, 1).
The second endpoint is (4, 4). When reflected across the y-axis, the x-coordinate changes sign, so it becomes (-4, 4).
Therefore, the reflected endpoints are (-1, 1) and (-4, 4).