Linear Function Bfeb10
1. **State the problem:** We are given the function $f(x) = 5 - 2x$ and want to understand its properties.
2. **Formula and rules:** This is a linear function of the form $f(x) = mx + b$ where $m$ is the slope and $b$ is the y-intercept.
3. **Identify slope and intercept:** Here, $m = -2$ and $b = 5$. The slope $-2$ means the function decreases by 2 units for every 1 unit increase in $x$.
4. **Find x-intercept:** Set $f(x) = 0$ to find where the graph crosses the x-axis:
$$0 = 5 - 2x$$
$$2x = 5$$
$$x = \frac{5}{2} = 2.5$$
5. **Find y-intercept:** This is the value of $f(x)$ when $x=0$:
$$f(0) = 5 - 2 \times 0 = 5$$
6. **Summary:** The function decreases linearly with slope $-2$, crosses the y-axis at $(0,5)$, and crosses the x-axis at $(2.5,0)$.
**Final answer:** $f(x) = 5 - 2x$ is a linear function with slope $-2$, y-intercept $5$, and x-intercept $2.5$.