Assume that the infant in Example 2 completes his journey in $20\ \mathrm{seconds}$.
Find the magnitude of his average velocity.
$\overline{v}=0.34\ \mathrm{\displaystyle \frac{m}{s}}$
Since the displacement is $6.7\ \mathrm{m}$, the magnitude of his average velocity is
$$\overline{v}=\frac{\Delta x}{\Delta t}$$
$$\overline{v}=\frac{(6.7\ \mathrm{m})}{(20\ \mathrm{s})}$$
$$\overline{v}=0.34\ \mathrm{\displaystyle \frac{m}{s}}$$