Describe the long run behavior of f(x)=x9\displaystyle {f{{\left({x}\right)}}}=-{x}^{{9}}

As x\displaystyle {x}\to-\infty, f(x)\displaystyle {f{{\left({x}\right)}}}\to

As x\displaystyle {x}\to\infty, f(x)\displaystyle {f{{\left({x}\right)}}}\to