#### Answer

vertical asymptotes $x\pm3$
horizontal asymptote $y=0$
no slant asymptote.
See graph.

#### Work Step by Step

Step 1. The vertical asymptotes can be found by letting $x^2-9=0$, which gives $x\pm3$
Step 2. The horizontal asymptote can be found when $x\pm\infty$ and we get $y=0$
Step 3. The slant asymptotes exist if the numerator is one order higher than the denominator; for the given rational function, there is no slant asymptote.
Step 4. See graph.