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{{ printedBook.courseTrack.name }} {{ printedBook.name }} We want to describe how to transform the parent function $y=x_{2}$ to the graph of the given quadratic function. $y=-(2x)_{2} $ To do so, we need to consider two possible transformations.

- Horizontal stretches and shrinks
- Reflections

Let's consider them one at the time.

$Parent Function$

$Shrink$

$Stretch$

In the given exercise, $x$ is multiplied by $2.$ Therefore, the previous graph will be horizontally shrunk by a factor of $21 .$

Whenever $x_{2}$ is multiplied by a *negative* number, we will have a reflection of the graph across the $x$-axis.

Note how each $x$-coordinate stays the same, and how each $y$-coordinate changes its sign.

Let's now graph the given function and the parent function $f(x)=x_{2}$ on the same coordinate grid.

Finally, let's summarize all the transformations of the graph of $f.$

- A horizontal shrink by a factor of $21 $
- Reflection in the $x$-axis