To reflect a point across the y-axis, you change the sign of the x-coordinate while leaving the y-coordinate unchanged.
Given the endpoints of the line segment:
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The first endpoint is (1, 1). Reflecting this across the y-axis gives us: \[ (-1, 1) \]
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The second endpoint is (4, 4). Reflecting this across the y-axis gives us: \[ (-4, 4) \]
Thus, the reflected endpoints of the line segment are: \[ (-1, 1) \text{ and } (-4, 4) \]
So the correct response is: (−1, 1) and (−4, 4).