Responder
To graph the line \( y = 2x + 4 \):
1. Plot the \( y \)-intercept at (0, 4).
2. Use the slope of 2 to find another point, such as (1, 6).
3. Draw a straight line through these points.
This line will rise upward as \( x \) increases.
Solución
To graph the line \( y = 2x + 4 \) using the slope and \( y \)-intercept, follow these steps:
### 1. Identify the \( y \)-Intercept
The equation \( y = 2x + 4 \) is in the slope-intercept form \( y = mx + b \), where:
- \( m \) is the **slope**.
- \( b \) is the **\( y \)-intercept**.
Here, the \( y \)-intercept \( b = 4 \). This means the line crosses the \( y \)-axis at the point **(0, 4)**.
### 2. Determine the Slope
The slope \( m = 2 \) indicates the steepness and direction of the line. A slope of 2 means that for every **1 unit** you move **horizontally** (to the right), you move **2 units** **vertically** (upward).
### 3. Plot the \( y \)-Intercept
Start by plotting the point **(0, 4)** on the coordinate plane.
### 4. Use the Slope to Find Another Point
From the \( y \)-intercept:
- Move **1 unit to the right** (increase \( x \) by 1).
- Move **2 units up** (increase \( y \) by 2).
This takes you to the point **(1, 6)**.
### 5. Draw the Line
Use a ruler to draw a straight line passing through the points **(0, 4)** and **(1, 6)**. Extend the line in both directions and add arrowheads to indicate that it continues indefinitely.
### 6. (Optional) Add Another Point for Accuracy
To ensure accuracy, you can plot a third point using the slope:
- From **(1, 6)**, move **1 unit to the right** to \( x = 2 \).
- Move **2 units up** to \( y = 8 \), giving the point **(2, 8)**.
### Visual Representation
Here's a simple ASCII representation of the graph:
```
y
|
10 |
9 |
8 | * (2,8)
7 |
6 | * (1,6)
5 |
4 | * (0,4)
3 |
2 |
1 |
0 |--------------------------
0 1 2 3 4 x
```
- The asterisks (*) represent the points plotted.
- Draw a straight line through these points to represent \( y = 2x + 4 \).
### Summary
- **\( y \)-Intercept**: (0, 4)
- **Slope**: 2 (rise over run: up 2, right 1)
- **Additional Points**: (1, 6), (2, 8), etc.
- **Graph**: A straight line passing through these points, rising upward as \( x \) increases.
By following these steps, you can accurately graph the line \( y = 2x + 4 \) on a coordinate plane.
Revisado y aprobado por el equipo de tutoría de UpStudy
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