[tex]\begin{gathered} A=(-3,2) \\ B=(-1,7) \\ C=(6,1) \end{gathered}[/tex]
After a reflection over the x-axis:
[tex]\begin{gathered} A(-3,2)\to(x,-y)\to A^{\prime}(-3,-2) \\ B(-1,7)\to(x,-y)\to B^{\prime}(-1,-7) \\ C(6,1)\to(x,-y)\to C^{\prime}(6,-1) \end{gathered}[/tex]
