Answer
Graphing as instructed, we see that
the graph of (b) is obtained by horizontally compressing the graph of (a) by factor 2.
the graph of (c) is obtained by horizontally stretching the graph of (a) by factor $\displaystyle \frac{1}{2}$.
Work Step by Step
$f(2x)$ is obtained by
horizontally compressing the graph of $f(x)$ by factor 2.
$f(\displaystyle \frac{1}{2}x)$ is obtained by
horizontally stretching the graph of $f(x)$ by factor $\displaystyle \frac{1}{2}$.
