Question: The mapping $(x, y) \to \left(\frac{1}{b} x + h, ay + k\right)$ can transform
y = f(x) into y = 2 + 7f\left(\frac{1}{2} (x + 3)\right)
Determine the mapping notation given the above function transformations
1. **State the problem:** We are given a transformation of the form $(x, y) \to \left(\frac{1}{b} x + h, ay + k\right)$ that transforms the function $y = f(x)$ into $y = 2 + 7f\left(\frac{1}{2} (x + 3)\right)$. We need to find the mapping notation in the form $(x,y) \to (x_\_, y_\_)$.
2. **Analyze the transformation inside the function argument:** The transformed function argument is $\frac{1}{2}(x + 3)$. This matches the form $\frac{1}{b} x + h$ where:
$$\frac{1}{b} x + h = \frac{1}{2} x + \frac{3}{2}$$
So, $\frac{1}{b} = \frac{1}{2} \implies b = 2$ and $h = \frac{3}{2}$.
3. **Analyze the transformation outside the function:** The transformed function is $y = 2 + 7 f(\ldots)$ which matches $ay + k$ where:
$$ay + k = 7y + 2$$
So, $a = 7$ and $k = 2$.
4. **Write the mapping notation:** Using the values found:
$$(x, y) \to \left(\frac{1}{2} x + \frac{3}{2}, 7y + 2\right)$$
In the required notation form $(x,y) \to (x_\_, y_\_)$, the mapping is:
"(\frac{3}{2}_2, 2_7)"
This means:
- For $x$: $x \to \frac{1}{2} x + \frac{3}{2}$ corresponds to $(x_2)$ with $h = \frac{3}{2}$
- For $y$: $y \to 7y + 2$ corresponds to $(y_7)$ with $k = 2$
**Final answer:**
"(\frac{3}{2}_2, 2_7)"