1. Let's start by stating the problem: You want to understand how to identify horizontal and vertical dilations and translations in a function.
2. The general form of transformations for a function $f(x)$ is:
- Horizontal dilation and translation: $f(b(x - h))$
- Vertical dilation and translation: $a f(x) + k$
3. Important rules:
- Horizontal transformations affect the input $x$ inside the function.
- Vertical transformations affect the output of the function.
4. Horizontal dilation (stretch/compression) is controlled by $b$:
- If $|b| > 1$, the graph compresses horizontally.
- If $0 < |b| < 1$, the graph stretches horizontally.
5. Horizontal translation (shift) is controlled by $h$:
- The graph shifts right by $h$ units if $h > 0$.
- The graph shifts left by $|h|$ units if $h < 0$.
6. Vertical dilation (stretch/compression) is controlled by $a$:
- If $|a| > 1$, the graph stretches vertically.
- If $0 < |a| < 1$, the graph compresses vertically.
7. Vertical translation (shift) is controlled by $k$:
- The graph shifts up by $k$ units if $k > 0$.
- The graph shifts down by $|k|$ units if $k < 0$.
8. Summary:
- Look inside the function argument for horizontal changes: $b$ and $h$.
- Look outside the function for vertical changes: $a$ and $k$.
This way, you can identify which transformations are horizontal or vertical by their position relative to the function $f(x)$.
Function Transformations 52282F
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