Using the graph of $f(x)$ at right, sketch the following functions. 

1. $f(2x)$

   Hint (a):

   When $x = 3$, the transformed function has a $y$-value of $f(6)$.

2. $f(\frac { 1 } { 2 }x)$

   Hint (b):

   When $x = 4$, the transformed function has a $y$-value of $f(2)$.

3. $f(-x)$

   Hint (c):

   Think about the relationship between the location of '$x$' and '$-x$'.

   Answer (c):

   It reflects the graph across the $y$-axis.