Gibbs Erickson
05/10/2023 · Elementary School
What is the equation of the line perpendicular to the line with equ ation \( 7 x+2 y=14 \) and passing through \( (7,-6) 7 \)
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Tutor-Verified Answer
Step-by-step Solution
To find the equation of the line that is perpendicular to the line given by the equation \( 7x + 2y = 14 \) and passes through the point \( (7, -6) \), we can follow these steps:
1. **Find the slope of the given line**: We start by rewriting the equation \( 7x + 2y = 14 \) in slope-intercept form \( y = mx + b \), where \( m \) is the slope.
\[
2y = -7x + 14
\]
\[
y = -\frac{7}{2}x + 7
\]
From this, we see that the slope \( m \) of the given line is \( -\frac{7}{2} \).
2. **Determine the slope of the perpendicular line**: The slope of a line that is perpendicular to another line is the negative reciprocal of the original line's slope. Therefore, the slope \( m_{\perp} \) of the perpendicular line is:
\[
m_{\perp} = -\frac{1}{-\frac{7}{2}} = \frac{2}{7}
\]
3. **Use the point-slope form to find the equation of the perpendicular line**: The point-slope form of a line is given by:
\[
y - y_1 = m(x - x_1)
\]
where \( (x_1, y_1) \) is a point on the line and \( m \) is the slope. Here, we have the point \( (7, -6) \) and the slope \( \frac{2}{7} \):
\[
y - (-6) = \frac{2}{7}(x - 7)
\]
\[
y + 6 = \frac{2}{7}(x - 7)
\]
4. **Simplify the equation**: Distributing the slope on the right side:
\[
y + 6 = \frac{2}{7}x - 2
\]
Now, subtract 6 from both sides:
\[
y = \frac{2}{7}x - 2 - 6
\]
\[
y = \frac{2}{7}x - 8
\]
5. **Final equation**: The equation of the line that is perpendicular to \( 7x + 2y = 14 \) and passes through the point \( (7, -6) \) is:
\[
\boxed{y = \frac{2}{7}x - 8}
\]
Quick Answer
The equation of the perpendicular line is \( y = \frac{2}{7}x - 8 \).
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