Question
Graphs and Lines 1. Graph each lis (a) \( y=3 x-1 \) c) \( 2 x-3 y+1 \)
Ask by Frank Mcfarlane. in Canada
Feb 03,2025
Real Tutor Solution
Tutor-Verified Answer
Answer
To graph the equations:
1. **For \( y = 3x - 1 \):**
- Plot the y-intercept at \( (0, -1) \).
- Use the slope of 3 to find another point, such as \( (1, 2) \).
- Draw a straight line through these points.
2. **For \( 2x - 3y + 1 = 0 \):**
- Rearrange to \( y = \frac{2}{3}x + \frac{1}{3} \).
- Plot the y-intercept at \( (0, \frac{1}{3}) \).
- Use the slope of \( \frac{2}{3} \) to find another point, such as \( (3, \frac{7}{3}) \).
- Draw a straight line through these points.
This will give you the graphs of both equations.
Solution
It seems that I cannot plot the graphs directly at the moment. However, I can guide you through the process of graphing the equations step by step.
### 1. Graphing \( y = 3x - 1 \)
This is a linear equation in slope-intercept form \( y = mx + b \), where:
- \( m = 3 \) (the slope)
- \( b = -1 \) (the y-intercept)
**Steps to graph:**
- **Find the y-intercept:** Set \( x = 0 \):
\[
y = 3(0) - 1 = -1
\]
So, the point is \( (0, -1) \).
- **Find another point using the slope:** The slope \( m = 3 \) means that for every 1 unit you move to the right (increase \( x \) by 1), you move up 3 units (increase \( y \) by 3).
- Starting from \( (0, -1) \), if \( x = 1 \):
\[
y = 3(1) - 1 = 2
\]
So, another point is \( (1, 2) \).
- **Plot the points:** Plot \( (0, -1) \) and \( (1, 2) \) on the graph and draw a line through them.
### 2. Graphing \( 2x - 3y + 1 = 0 \)
First, we can rearrange this equation into slope-intercept form \( y = mx + b \).
**Rearranging the equation:**
\[
2x - 3y + 1 = 0 \implies -3y = -2x - 1 \implies y = \frac{2}{3}x + \frac{1}{3}
\]
Now, we have:
- Slope \( m = \frac{2}{3} \)
- Y-intercept \( b = \frac{1}{3} \)
**Steps to graph:**
- **Find the y-intercept:** Set \( x = 0 \):
\[
y = \frac{2}{3}(0) + \frac{1}{3} = \frac{1}{3}
\]
So, the point is \( (0, \frac{1}{3}) \).
- **Find another point using the slope:** The slope \( m = \frac{2}{3} \) means that for every 3 units you move to the right (increase \( x \) by 3), you move up 2 units (increase \( y \) by 2).
- Starting from \( (0, \frac{1}{3}) \), if \( x = 3 \):
\[
y = \frac{2}{3}(3) + \frac{1}{3} = 2 + \frac{1}{3} = \frac{7}{3}
\]
So, another point is \( (3, \frac{7}{3}) \).
- **Plot the points:** Plot \( (0, \frac{1}{3}) \) and \( (3, \frac{7}{3}) \) on the graph and draw a line through them.
### Summary
- For \( y = 3x - 1 \), plot points \( (0, -1) \) and \( (1, 2) \).
- For \( 2x - 3y + 1 = 0 \), plot points \( (0, \frac{1}{3}) \) and \( (3, \frac{7}{3}) \).
You can use graph paper or a graphing tool to visualize these lines based on the points calculated.
Reviewed and approved by the UpStudy tutoring team
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Bonus Knowledge
To graph the equation \( y = 3x - 1 \), you can start by plotting the y-intercept at (0, -1). From there, use the slope of 3, which means for every 1 unit you move right along the x-axis, move up 3 units. Draw a straight line through these points, and voilà! For the equation \( 2x - 3y + 1 = 0 \), first rearrange it into slope-intercept form, yielding \( y = \frac{2}{3}x + \frac{1}{3} \). Now, plot the y-intercept at (0, 1/3) and use the slope of \( \frac{2}{3} \) to find additional points. Connect them to create a lovely line!