Find the slopes of the lines that passes through the given points. Then determine if the two lines are parallel or perpendicular or neither.

The line passing through the points (4,-3) and (6,2)
The line passing through the points (3,-2) and (13,2)
The slope of line 1 is Response area and the slope of line 2 is Response area. These lines are Response area.

1 answer

To find the slopes of the lines that pass through the given points, we use the formula for the slope \( m \) of a line that passes through two points \((x_1, y_1)\) and \((x_2, y_2)\):

\[ m = \frac{y_2 - y_1}{x_2 - x_1} \]

Line 1: Points (4, -3) and (6, 2)

Let \((x_1, y_1) = (4, -3)\) and \((x_2, y_2) = (6, 2)\).

\[ m_1 = \frac{2 - (-3)}{6 - 4} = \frac{2 + 3}{6 - 4} = \frac{5}{2} \]

So, the slope of line 1 is \( m_1 = \frac{5}{2} \).

Line 2: Points (3, -2) and (13, 2)

Let \((x_1, y_1) = (3, -2)\) and \((x_2, y_2) = (13, 2)\).

\[ m_2 = \frac{2 - (-2)}{13 - 3} = \frac{2 + 2}{13 - 3} = \frac{4}{10} = \frac{2}{5} \]

So, the slope of line 2 is \( m_2 = \frac{2}{5} \).

Determine the relationship between the lines

  1. Parallel lines have the same slope \( m_1 = m_2 \).
  2. Perpendicular lines have slopes that are negative reciprocals of each other, i.e., \( m_1 \cdot m_2 = -1 \).

Now, we check if the lines are parallel or perpendicular:

  • Slopes:

    • Slope of line 1: \( m_1 = \frac{5}{2} \)
    • Slope of line 2: \( m_2 = \frac{2}{5} \)
  • Check for parallel:

    • \( m_1 \neq m_2 \) (since \( \frac{5}{2} \neq \frac{2}{5} \))
  • Check for perpendicular:

    • Multiply the slopes: \[ m_1 \cdot m_2 = \frac{5}{2} \cdot \frac{2}{5} = \frac{10}{10} = 1 \quad \text{(not } -1\text{)} \]

Conclusion

The slopes are:

  • Slope of line 1: \(\frac{5}{2}\)
  • Slope of line 2: \(\frac{2}{5}\)

The two lines are neither parallel nor perpendicular.

So, filling in the response areas:

  • The slope of line 1 is \(\frac{5}{2}\).
  • The slope of line 2 is \(\frac{2}{5}\).
  • These lines are neither parallel nor perpendicular.