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To graph the equation \( 2x + 3y = 6 \), find the x-intercept at \( (3, 0) \) and the y-intercept at \( (0, 2) \). Plot these points and draw a straight line through them to represent the equation.
Solución
To find the intercepts and graph the equation \( 2x + 3y = 6 \), follow these steps:
### 1. Find the Intercepts
**a. X-Intercept:**
The x-intercept occurs where the graph crosses the x-axis. At this point, \( y = 0 \).
\[
2x + 3(0) = 6 \\
2x = 6 \\
x = 3
\]
**X-Intercept:** \( (3, 0) \)
---
**b. Y-Intercept:**
The y-intercept occurs where the graph crosses the y-axis. At this point, \( x = 0 \).
\[
2(0) + 3y = 6 \\
3y = 6 \\
y = 2
\]
**Y-Intercept:** \( (0, 2) \)
### 2. Plot the Intercepts on a Coordinate Plane
1. **Plot the X-Intercept:** Place a point at \( (3, 0) \).
2. **Plot the Y-Intercept:** Place a point at \( (0, 2) \).
### 3. Find Additional Points (Optional)
To ensure accuracy, you can find additional points by choosing values for \( x \) or \( y \) and solving for the other variable.
**Example 1:** Let \( x = 1 \)
\[
2(1) + 3y = 6 \\
2 + 3y = 6 \\
3y = 4 \\
y = \frac{4}{3} \approx 1.33
\]
**Point:** \( (1, \frac{4}{3}) \)
**Example 2:** Let \( y = 1 \)
\[
2x + 3(1) = 6 \\
2x + 3 = 6 \\
2x = 3 \\
x = \frac{3}{2} = 1.5
\]
**Point:** \( \left( \frac{3}{2}, 1 \right) \)
### 4. Draw the Graph
1. **Draw the Axes:** Draw a horizontal x-axis and a vertical y-axis intersecting at the origin \( (0, 0) \).
2. **Plot the Points:**
- \( (3, 0) \) — X-Intercept
- \( (0, 2) \) — Y-Intercept
- \( (1, \frac{4}{3}) \) — Additional Point
- \( \left( \frac{3}{2}, 1 \right) \) — Additional Point
3. **Connect the Points:** Draw a straight line that passes through all the plotted points. This line represents the equation \( 2x + 3y = 6 \).
### 5. Visual Representation
Below is a simple graphical representation:
```
y
|
| *
| (0,2)
|
| *
| (1.5,1)
|
| *
| (3,0)
|
+------------------ x
```
- The points \( (3, 0) \) and \( (0, 2) \) are the intercepts.
- The additional points help in drawing the accurate line.
### 6. Slope-Intercept Form (Optional)
For better understanding, you can rewrite the equation in slope-intercept form (\( y = mx + b \)):
\[
2x + 3y = 6 \\
3y = -2x + 6 \\
y = -\frac{2}{3}x + 2
\]
- **Slope (\( m \))**: \( -\frac{2}{3} \)
- **Y-Intercept (\( b \))**: \( 2 \)
This means the line decreases by \( \frac{2}{3} \) units vertically for every 1 unit it moves horizontally to the right.
### Summary
- **X-Intercept:** \( (3, 0) \)
- **Y-Intercept:** \( (0, 2) \)
- **Slope:** \( -\frac{2}{3} \)
By plotting these points and using the slope, you can accurately graph the equation \( 2x + 3y = 6 \).
Respondido por UpStudy AI y revisado por un tutor profesional
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