Respuesta :

we you reflect a point across x-axis you do this

[tex](x,y)\longrightarrow(x,-y)[/tex]

so, the point (5,3) is

[tex](5,3)\longrightarrow(5,-3)[/tex]

to reflect across the x-axis you change the sign of the y coordinate

example

[tex](2,-1)\longrightarrow(2,1)[/tex]