Chapter 6.5, Problem 6SBE

To determine

(a)

The sign of $\frac{df}{dx}$, when $f$ is less than $3$.

To determine

(b)

The graph of $f$ versus $x$ when $f$ is less than 3.

To determine

(c)

The sign of $\frac{df}{dx}$ when $f$ is greater than 3.

To determine

(d)

The graph of $f$ versus $x$ when $f$ is greater than 3.