Byrd Moreno
05/13/2024 · Primary School
Graph the linear function and give the domain and the range. If the function is a constant function, identify it as such. \( h(x)=2 x \)
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Tutor-Verified Answer
Step-by-step Solution
To graph the linear function \( h(x) = 2x \), we can start by identifying some key points. This function is a linear function with a slope of 2 and a y-intercept of 0.
### Key Points:
1. When \( x = 0 \):
\[
h(0) = 2(0) = 0 \quad \text{(Point: (0, 0))}
\]
2. When \( x = 1 \):
\[
h(1) = 2(1) = 2 \quad \text{(Point: (1, 2))}
\]
3. When \( x = -1 \):
\[
h(-1) = 2(-1) = -2 \quad \text{(Point: (-1, -2))}
\]
### Graph:
To graph the function, plot the points (0, 0), (1, 2), and (-1, -2) on a coordinate plane. Then, draw a straight line through these points, extending in both directions.
### Domain and Range:
- **Domain**: The domain of a linear function is all real numbers, since you can input any real number for \( x \). Therefore, the domain is:
\[
\text{Domain: } (-\infty, \infty)
\]
- **Range**: Similarly, the range of a linear function is also all real numbers, as the output \( h(x) \) can take any real value. Therefore, the range is:
\[
\text{Range: } (-\infty, \infty)
\]
### Conclusion:
The function \( h(x) = 2x \) is not a constant function; it is a linear function with a slope of 2.
- **Domain**: \( (-\infty, \infty) \)
- **Range**: \( (-\infty, \infty) \)
Quick Answer
The function \( h(x) = 2x \) is a linear function with a domain and range of \( (-\infty, \infty) \).
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