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To graph the line \( y = -\frac{1}{5}x - 3 \), plot the y-intercept at (0, -3). Then, use the slope of -1/5 to find another point, such as (5, -4). Draw a straight line through these points to complete the graph.
Solución
Sure! Let's graph the linear equation \( y = -\frac{1}{5}x - 3 \).
### 1. Understanding the Equation
The equation is in the slope-intercept form:
\[ y = mx + b \]
where:
- **\( m \)** is the slope of the line.
- **\( b \)** is the y-intercept (the point where the line crosses the y-axis).
For \( y = -\frac{1}{5}x - 3 \):
- **Slope (m)** = -\(\frac{1}{5}\)
- **Y-intercept (b)** = -3
### 2. Plotting the Graph
#### Step 1: Plot the Y-intercept
Start by plotting the y-intercept (\(0, -3\)) on the graph.
#### Step 2: Use the Slope to Find Another Point
The slope \( -\frac{1}{5} \) means that for every 5 units you move to the right (positive direction on the x-axis), you move down by 1 unit (negative direction on the y-axis).
From the y-intercept (\(0, -3\)):
- Move 5 units to the right: \( x = 0 + 5 = 5 \)
- Move 1 unit down: \( y = -3 - 1 = -4 \)
- Plot the point (\(5, -4\))
Alternatively, you can move 5 units to the left and 1 unit up:
- Move 5 units to the left: \( x = 0 - 5 = -5 \)
- Move 1 unit up: \( y = -3 + 1 = -2 \)
- Plot the point (\(-5, -2\))
#### Step 3: Draw the Line
Connect the plotted points with a straight line extending in both directions.
### 3. Visual Representation
Here's a simple graph illustrating the line:
```
y
|
| *
| (5,-4)
|
|
|* (-5,-2)
|(0,-3)
|________________________ x
```
- The point **(0, -3)** is the y-intercept.
- The point **(5, -4)** is obtained using the slope.
- The point **(-5, -2)** is another point on the line using the slope in the opposite direction.
### 4. Summary
- **Y-intercept**: (0, -3)
- **Slope**: -1/5 (down 1 unit for every 5 units to the right)
- **Another Point**: (5, -4) or (-5, -2)
By plotting these points and drawing a line through them, you get the graph of the equation \( y = -\frac{1}{5}x - 3 \).
If you have graphing software or a graphing calculator, you can input the equation to see a more precise graph. Let me know if you need further assistance!
Revisado y aprobado por el equipo de tutoría de UpStudy
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