## Precalculus (6th Edition) Blitzer

Step 1. From the given equation, we have $a=4, b=1$; thus $c=\sqrt {4^2+1^2}=\sqrt {17}$ Step 2. See graph; we can locate the foci at $(\pm\sqrt {17},0)$ Step 3. The asymptotes can be found as $y=\pm\frac{1}{4}x$