We are given the following coordinates.
![\begin{gathered} S(0,-3) \\ T(3,1) \\ U(4,-3) \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/8vqnv3d1c8oauyrvb0asucfmcgxndknbib.png)
We are asked to reflect them across the x-axis.
Recall that the rule for reflection across the x-axis is given by
![(x,y)\rightarrow(x,-y)](https://img.qammunity.org/2023/formulas/mathematics/college/d7a29ae1nc5itoub5zbvfqbwxpczq9rzr6.png)
As you can see, the y-coordinate gets reversed.
Let us apply this rule on the given coordinates S, T, U
![\begin{gathered} S(0,-3)\rightarrow U^(\prime)(0,3) \\ T(3,1)\rightarrow T^(\prime)(3,-1) \\ U(4,-3)\rightarrow U^(\prime)(4,3) \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/ch2uifaq0dektfthffmwo35i12yixzq3sw.png)
Therefore, the above coordinates are reflected over the x-axis.