[latex]f egin{array}{rllll} (6&,&3)&f(x)\ x&&y\\ (-frac{1}{2}x&,&3)&f(-frac{1}{2}x)\\ (-frac{1}{2}cdot 6&,&3)\\ (-3&,&3) end{array}[/latex] keep in mind that, a negative coefficient to "x", will make the graph reflect over the y-axis.