## Thinking Mathematically (6th Edition)

(a) $f(6)=1$ (b) $f(-6)=-1$
RECALL: $f(a)$ represents the value of the function $f$ when $x=a$. Replace $x$ with the given value to obtain: (a) $f(6) = \dfrac{6}{|6|} \\f(6)= \dfrac{6}{6} \\f(6)=1$ (b) $f(-6) = \dfrac{-6}{|-6|} \\f(-6)= \dfrac{-6}{6} \\f(-6)=-1$