Responder
To graph the function \( f(x) \), plot a solid line from \( (2,1) \) to just below \( (6,5) \), a closed dot at \( (6,-3) \), and a horizontal line at \( y = -4 \) for \( x > 6 \).
Solución
Certainly! Let's graph the piecewise function:
\[
f(x)=\left\{
\begin{array}{lll}
x-1 & \text{for} & 2 \leq x < 6 \\
-3 & \text{for} & x = 6 \\
-4 & \text{for} & x > 6
\end{array}
\right.
\]
### Step-by-Step Graphing:
1. **Identify the Different Pieces of the Function:**
- **Line Segment:** \( f(x) = x - 1 \) for \( 2 \leq x < 6 \)
- **Point:** \( f(x) = -3 \) at \( x = 6 \)
- **Horizontal Line:** \( f(x) = -4 \) for \( x > 6 \)
2. **Plot Each Piece Separately:**
- **For \( 2 \leq x < 6 \), \( f(x) = x - 1 \):**
- Calculate endpoints:
- At \( x = 2 \): \( f(2) = 2 - 1 = 1 \)
- As \( x \) approaches 6: \( f(6^-) = 6 - 1 = 5 \)
- Plot a **solid line** from \( (2, 1) \) to just below \( (6, 5) \). Use an **open circle** at \( (6, 5) \) to indicate that \( x = 6 \) is not included in this interval.
- **At \( x = 6 \), \( f(x) = -3 \):**
- Plot a **solid dot** at \( (6, -3) \).
- **For \( x > 6 \), \( f(x) = -4 \):**
- Draw a **horizontal dashed line** starting just after \( x = 6 \) at \( y = -4 \).
- Optionally, use an **open circle** at \( (6, -4) \) if you want to indicate that \( x = 6 \) is not included in this interval.
3. **Combine All Pieces:**
Here's a conceptual representation of the graph:
```
y
|
5 | o
4 |-----------------
3 | *
2 |
1 |●
0 |________________________ x
2 6
```
- **●** at \( (2, 1) \): Start of the line segment.
- **o** at \( (6, 5) \): Open circle where the line segment approaches but doesn't include \( x = 6 \).
- **\*** at \( (6, -3) \): Solid dot representing \( f(6) = -3 \).
- **\--** line extending to the right from \( x = 6 \) at \( y = -4 \): Represents \( f(x) = -4 \) for \( x > 6 \).
### Detailed Description:
- **From \( x = 2 \) to \( x = 6 \):**
- The function increases linearly with a slope of 1.
- It starts at \( (2, 1) \) and approaches \( (6, 5) \) but does not include this point.
- **At \( x = 6 \):**
- There is a distinct value \( f(6) = -3 \), represented by a closed dot.
- **For \( x > 6 \):**
- The function is constant at \( y = -4 \).
### Summary:
- **Line Segment:** Solid line from \( (2,1) \) to \( (6,5) \) (open at \( x = 6 \)).
- **Point at \( x = 6 \):** Closed dot at \( (6,-3) \).
- **Horizontal Line for \( x > 6 \):** Dashed or solid line at \( y = -4 \).
If you have graphing software or graph paper, you can plot these points and lines accordingly to visualize the function.
Revisado y aprobado por el equipo de tutoría de UpStudy
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