1. **State the problem:** We are given the linear function $f(x) = -2x + 5$ and asked to analyze its intercepts and end behavior.
2. **Find the x-intercept:** The x-intercept occurs where $f(x) = 0$.
$$0 = -2x + 5$$
Add $2x$ to both sides:
$$2x = 5$$
Divide both sides by 2:
$$x = \frac{\cancel{2}x}{\cancel{2}} = \frac{5}{2} = 2.5$$
So the x-intercept is at $(2.5, 0)$.
3. **Find the y-intercept:** The y-intercept occurs where $x = 0$.
$$f(0) = -2(0) + 5 = 5$$
So the y-intercept is at $(0, 5)$.
4. **Analyze end behavior:** Since the function is linear with slope $-2$ (negative), as $x \to -\infty$, the value of $f(x)$ increases without bound:
$$\lim_{x \to -\infty} f(x) = \lim_{x \to -\infty} (-2x + 5) = \infty$$
As $x \to \infty$, the value of $f(x)$ decreases without bound:
$$\lim_{x \to \infty} f(x) = \lim_{x \to \infty} (-2x + 5) = -\infty$$
5. **Summary:**
- x-intercept: $(2.5, 0)$
- y-intercept: $(0, 5)$
- End behavior: as $x \to -\infty$, $y \to \infty$; as $x \to \infty$, $y \to -\infty$.
This matches the behavior of a line with negative slope crossing the y-axis at 5 and x-axis at 2.5.
Linear Function 388E2E
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