Exercise 39 Page 217

Before we begin, let's recall two important definitions.

• A function $f$ is an even function when $f(\text{-}x)=f(x)$ for all $x$ in its domain.
• A function $f$ is an odd function when $f(\text{-}x)=\text{-}f(x)$ for all $x$ in its domain.

Let's see how the graphs of these types of functions look.