Line I passes through the points (-4, -7) and (2, 3) on the coordinate plane. Line m passess through the points (-4, 1) and (2, w). For what value of w is line m parallel to line l? O 3 4 O 1 O 1

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Author:Ron Larson
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ChapterP: Prerequisites
SectionP.6: The Rectangular Coordinate System And Graphs
Problem 37E: An airplane flies from Naples, Italy, in a straight line to Rome, Italy, which is 120 kilometers...
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Line l passes through the points (-4, -7) and (2, 3) on the coordinate plane.  Line m passess through the points (-4, 1) and (2, w).  For what value of w is line m parallel to line l?

 
**Problem Statement:**
Line \( l \) passes through the points (-4, -7) and (2, 3) on the coordinate plane. Line \( m \) passes through the points (-4, 1) and (2, w). For what value of \( w \) is line \( m \) parallel to line \( l \)?

**Options:**
- O -3
- O 4
- O 1
- O 11

### Explanation:

To determine the value of \( w \) such that line \( m \) is parallel to line \( l \), we need to calculate the slopes of both lines and set them equal to each other.

**Calculating the slope of line \( l \):**
The slope \( m \) of a line passing through two points \((x_1, y_1)\) and \((x_2, y_2)\) is given by the formula:
\[ m = \frac{y_2 - y_1}{x_2 - x_1} \]

For line \( l \), the points are \((-4, -7)\) and \( (2, 3) \):
\[ m_l = \frac{3 - (-7)}{2 - (-4)} = \frac{3 + 7}{2 + 4} = \frac{10}{6} = \frac{5}{3} \]

**Calculating the slope of line \( m \):**
For line \( m \), the points are \((-4, 1)\) and \( (2, w) \):
\[ m_m = \frac{w - 1}{2 - (-4)} = \frac{w - 1}{2 + 4} = \frac{w - 1}{6} \]

Since the lines are parallel, their slopes must be equal:
\[ \frac{5}{3} = \frac{w - 1}{6} \]

Cross-multiplying to solve for \( w \):
\[ 5 \times 6 = 3 \times (w - 1) \]
\[ 30 = 3w - 3 \]
\[ 30 + 3 = 3w \]
\[ 33 = 3w \]
\[ w = \frac{33}{3} \]
\[ w = 11 \]

Therefore, the value of
Transcribed Image Text:**Problem Statement:** Line \( l \) passes through the points (-4, -7) and (2, 3) on the coordinate plane. Line \( m \) passes through the points (-4, 1) and (2, w). For what value of \( w \) is line \( m \) parallel to line \( l \)? **Options:** - O -3 - O 4 - O 1 - O 11 ### Explanation: To determine the value of \( w \) such that line \( m \) is parallel to line \( l \), we need to calculate the slopes of both lines and set them equal to each other. **Calculating the slope of line \( l \):** The slope \( m \) of a line passing through two points \((x_1, y_1)\) and \((x_2, y_2)\) is given by the formula: \[ m = \frac{y_2 - y_1}{x_2 - x_1} \] For line \( l \), the points are \((-4, -7)\) and \( (2, 3) \): \[ m_l = \frac{3 - (-7)}{2 - (-4)} = \frac{3 + 7}{2 + 4} = \frac{10}{6} = \frac{5}{3} \] **Calculating the slope of line \( m \):** For line \( m \), the points are \((-4, 1)\) and \( (2, w) \): \[ m_m = \frac{w - 1}{2 - (-4)} = \frac{w - 1}{2 + 4} = \frac{w - 1}{6} \] Since the lines are parallel, their slopes must be equal: \[ \frac{5}{3} = \frac{w - 1}{6} \] Cross-multiplying to solve for \( w \): \[ 5 \times 6 = 3 \times (w - 1) \] \[ 30 = 3w - 3 \] \[ 30 + 3 = 3w \] \[ 33 = 3w \] \[ w = \frac{33}{3} \] \[ w = 11 \] Therefore, the value of
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