1. **Stating the problem:** We are given the function $f(x) = \sqrt[3]{x - 8}$ and want to understand its properties.
2. **Formula and rules:** The cube root function $\sqrt[3]{x}$ is defined for all real numbers $x$ and is the inverse of the cube function $x^3$.
3. **Rewrite the function:** We can write $f(x)$ as $$f(x) = (x - 8)^{\frac{1}{3}}$$
4. **Domain:** Since cube roots are defined for all real numbers, the domain of $f$ is all real numbers, $(-\infty, \infty)$.
5. **Intercepts:**
- To find the $x$-intercept, set $f(x) = 0$:
$$0 = (x - 8)^{\frac{1}{3}} \implies x - 8 = 0 \implies x = 8$$
So the $x$-intercept is at $(8, 0)$.
- To find the $y$-intercept, set $x = 0$:
$$f(0) = (0 - 8)^{\frac{1}{3}} = (-8)^{\frac{1}{3}} = -2$$
So the $y$-intercept is at $(0, -2)$.
6. **Behavior and shape:** The cube root function is increasing and continuous everywhere. The graph shifts 8 units to the right compared to $y = \sqrt[3]{x}$.
7. **Summary:**
- Domain: all real numbers
- $x$-intercept: $(8, 0)$
- $y$-intercept: $(0, -2)$
- The function is increasing and smooth.
**Final answer:** The function $f(x) = \sqrt[3]{x - 8}$ has domain $(-\infty, \infty)$, $x$-intercept at $(8, 0)$, and $y$-intercept at $(0, -2)$.
Cube Root Function 966F1A
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