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To graph the line \( y = -7x + 10 \), plot the y-intercept at \( (0, 10) \) and use the slope to find another point, such as \( (1, 3) \). Draw a straight line through these points to complete the graph.
Solución
Sure! Let's graph the line given by the equation:
\[ y = -7x + 10 \]
This equation is in **slope-intercept form**, which is:
\[ y = mx + b \]
where:
- \( m \) is the **slope** of the line.
- \( b \) is the **y-intercept** (the point where the line crosses the y-axis).
### Step 1: Identify the Slope and Y-Intercept
From the equation \( y = -7x + 10 \):
- **Slope (\( m \))**: \(-7\)
- **Y-Intercept (\( b \))**: \(10\)
### Step 2: Plot the Y-Intercept
Start by plotting the y-intercept on the graph.
- **Point**: \( (0, 10) \)
![Step 2: Y-Intercept](https://i.imgur.com/9lzIUDK.png)
### Step 3: Use the Slope to Find Another Point
The slope \( m = -7 \) can be interpreted as:
- **Rise**: \(-7\) (down 7 units)
- **Run**: \(1\) (right 1 unit)
From the y-intercept \( (0, 10) \):
1. **Run 1 unit to the right**: \( x = 0 + 1 = 1 \)
2. **Rise \(-7\) units**: \( y = 10 - 7 = 3 \)
- **Second Point**: \( (1, 3) \)
![Step 3: Second Point](https://i.imgur.com/2kHr7hQ.png)
### Step 4: Draw the Line
Connect the two points \( (0, 10) \) and \( (1, 3) \) with a straight line. Extend the line in both directions.
![Step 4: Graph of the Line](https://i.imgur.com/NE8c2pn.png)
### Summary of Points to Plot
- **Y-Intercept**: \( (0, 10) \)
- **Using Slope**: \( (1, 3) \)
- **Alternatively**, you can find another point by moving **left** instead:
- **Run -1 unit**: \( x = 0 - 1 = -1 \)
- **Rise +7 units**: \( y = 10 + 7 = 17 \)
- **Another Point**: \( (-1, 17) \)
Plot these points and draw the line through them to complete the graph of \( y = -7x + 10 \).
If you're using graphing software or an online graphing tool, you can input the equation \( y = -7x + 10 \) directly to visualize the line.
Revisado y aprobado por el equipo de tutoría de UpStudy
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