Answer:
The required co-ordinate is (-2, -5).
Step-by-step explanation:
For a given point, reflection of a point (x, y) across a horizontal line y = k, the reflected co-ordinates will be: [tex]$ R_{y = k} = (x, 2k - y) $[/tex].
Here, (x, y) = (-2, 7) then reflection along the line y = 1, we get:
[tex]$ R_{y = 1} (-2, 7) = (-2, 2(1) - 7) $[/tex]
= (-2, -5)
The reflected point is (-2, -5).
