Respuesta :
When a point is reflected, it must be reflected across a line
The coordinate of D' is: (-2,-1)
The coordinates of D are given as:
[tex]\mathbf{D =(-2,1)}[/tex]
The line of reflection is the x-axis
The rule of reflection, across the x-axis is:
[tex]\mathbf{(x,y) \to (x,-y)}[/tex]
So, we have:
[tex]\mathbf{(-2,1) \to (-2,-1)}[/tex]
This means that; the coordinates of D' are:
[tex]\mathbf{D' = (-2,-1)}[/tex]
Read more about reflections at:
https://brainly.com/question/17983440