## anonymous 5 years ago Find an expression for the function whose graph is the bottom half of the parabola x + (y - 8)2 = 0.

1. anonymous

is it -sqrt(x-8)^2

2. watchmath

$$(y-8)^2=-x$$ $$y-8=\pm\sqrt{-x}$$ For the bottom half, $$y<8$$ So $$y=8- \sqrt{-x}$$