When you transform a coordinate by reflecting across the x-axis, only the y-coordinate will be transformed from positive to negative and vice versa
[tex]\text{ Reflected along x-axis: M(x,y) }\rightarrow\text{ M'(x,-y)}[/tex]
For the given point: (-4,-8)
The transformed coordinates when reflected along the x-axis will be,
[tex]\text{M(x,y) }\rightarrow\text{ M'(x,-y)}[/tex][tex]\text{M(-4,-8) }\rightarrow\text{ M'(-4,-(-8))}[/tex][tex]\text{M(-4,-8) }\rightarrow\text{ M'(-4,8)}[/tex]
Therefore, M' = (-4,8).
