Question
Question 10 of 14, Step 1 of 1 Find the equation in slope-intercept form for the line passing through the points with the given coordinates. Answer
Ask by Estrada Washington. in the United States
Feb 03,2025
Real Tutor Solution
Tutor-Verified Answer
Answer
To find the equation of a line in slope-intercept form (\( y = mx + b \)) passing through two points, follow these steps:
1. **Identify the Points:** Let the points be \( P_1(x_1, y_1) \) and \( P_2(x_2, y_2) \).
2. **Calculate the Slope (\( m \)):**
\[
m = \frac{y_2 - y_1}{x_2 - x_1}
\]
3. **Use the Slope-Intercept Form:**
\[
y = mx + b
\]
4. **Find the Y-Intercept (\( b \)):**
Substitute one point into the equation to solve for \( b \):
\[
b = y_1 - m \cdot x_1
\]
5. **Write the Final Equation:**
Plug \( m \) and \( b \) back into the slope-intercept form.
**Example:**
For points \( (2, 3) \) and \( (4, 7) \):
- Slope \( m = 2 \)
- Y-intercept \( b = -1 \)
- Equation: \( y = 2x - 1 \)
Provide the specific points to get the exact equation.
Solution
Sure, I'd be happy to help you find the equation of the line in slope-intercept form (\( y = mx + b \)) that passes through two given points. To provide an accurate answer, I'll need the coordinates of those points. However, I can guide you through the general steps to find the equation:
### Steps to Find the Equation of a Line Passing Through Two Points
1. **Identify the Coordinates:**
Let's denote the two points as \( P_1(x_1, y_1) \) and \( P_2(x_2, y_2) \).
2. **Calculate the Slope (\( m \)):**
The slope of the line is determined by the change in \( y \) divided by the change in \( x \):
\[
m = \frac{y_2 - y_1}{x_2 - x_1}
\]
3. **Use the Slope-Intercept Form:**
The slope-intercept form of a line is:
\[
y = mx + b
\]
You already have \( m \) from the previous step.
4. **Solve for the Y-Intercept (\( b \)):**
Substitute one of the points and the slope into the equation to solve for \( b \):
\[
y_1 = m \cdot x_1 + b \\
b = y_1 - m \cdot x_1
\]
5. **Write the Final Equation:**
Plug the values of \( m \) and \( b \) back into the slope-intercept form to get the equation of the line.
### Example
Let's go through an example for clarity.
**Given Points:**
- \( P_1(2, 3) \)
- \( P_2(4, 7) \)
**1. Calculate the Slope (\( m \)):**
\[
m = \frac{7 - 3}{4 - 2} = \frac{4}{2} = 2
\]
**2. Use the Slope-Intercept Form:**
\[
y = 2x + b
\]
**3. Solve for \( b \) Using Point \( P_1(2, 3) \):**
\[
3 = 2 \cdot 2 + b \\
3 = 4 + b \\
b = 3 - 4 \\
b = -1
\]
**4. Write the Final Equation:**
\[
y = 2x - 1
\]
So, the equation of the line passing through the points \( (2, 3) \) and \( (4, 7) \) is \( y = 2x - 1 \).
### If You Provide the Coordinates
If you provide the specific coordinates of the two points you're working with, I can give you a tailored solution to find the exact equation of the line passing through them.
Reviewed and approved by the UpStudy tutoring team
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To find the equation in slope-intercept form (y = mx + b) for a line passing through two points, start by determining the slope (m) using the formula \(m = \frac{y_2 - y_1}{x_2 - x_1}\). For example, if the points are (2, 3) and (4, 7), the slope would be \(m = \frac{7 - 3}{4 - 2} = 2\). Once you have the slope, use one of the points and substitute it into the slope-intercept form to solve for b (the y-intercept). If we use point (2, 3), we'd plug in the values as follows: \(3 = 2(2) + b\), which simplifies to \(b = -1\). Thus, the equation becomes \(y = 2x - 1\).