Triangle ABC has vertices with coordinates A(2,3), B(7,8), and C(-4,6). The triangle is reflected about line L. The image points are A(2,-5), B'(7,-10), and C'(-4,-8). What is the equation of line L?
Graphing this, we find that Triangle ABC and its reflection are reflected horizontally.
The line of reflection must be the midpoint of A and A'. The x point of A is 3 and the x point of A' is -5. The midpoint must be -1 then. The equation of Line L should be y= -1.
Correct me if I'm wrong.