The general rule for an x-axis reflection given a point (x,y) is:
[tex]r_x(x,y)=(x,-y)[/tex]
if we apply the transformation to the points P,Q and R, we get:
[tex]\begin{gathered} P=(-8,-6) \\ \Rightarrow P^{\prime}=r_x(-8,-6)=(-8,6) \\ Q=(-5,-2) \\ \Rightarrow Q^{\prime}=r_x(-5,-2)=(-5,2) \\ R=(2,-1) \\ \Rightarrow R^{\prime}=r_x(x,y)=(2,1) \end{gathered}[/tex]
and the graph would be the following:
