Question 777091
Any point (x,y), reflected about the x-axis turns int (x,-y).
The y changes sign.
So {{{y=x^3+1}}} {{{graph(200,200,-5,5,-10,10,x^3+1)}}}
turns into
{{{-y=x^3+1}}} --> {{{highlight(y=-x^3-1)}}}  {{{graph(200,200,-5,5,-10,10,-x^3-1)}}}