Pregunta
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Find the equation of the line that is perpendicular to this line and passes through the point \( (-5,6) \). Find the equation of the line that is parallel to this line and passes through the point \( (-5,6) \).

Ask by Goodwin Bartlett. in the United States
Mar 17,2025

Solución de inteligencia artificial de Upstudy

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The perpendicular line is \( y = -\frac{1}{3}x + \frac{13}{3} \) and the parallel line is \( y = 3x + 21 \).

Solución

Assume the given line has the equation \[ y=3x+2. \] **Step 1. Find the slope of the given line.** Since the line is written in slope‐intercept form, the slope is \[ m=3. \] **Step 2. Find the slope of the line perpendicular to the given line.** For two perpendicular lines the slopes satisfy \[ m\cdot m_\perp=-1. \] Thus, the slope of the perpendicular line is \[ m_\perp=-\frac{1}{3}. \] **Step 3. Write the equation of the perpendicular line through \((-5,6)\).** Using the point–slope form \[ y-y_1=m(x-x_1), \] with \((x_1,y_1)=(-5,6)\) and \(m=-\frac{1}{3}\), we get \[ y-6=-\frac{1}{3}(x+5). \] To express this in slope–intercept form, solve for \(y\): \[ y= -\frac{1}{3}(x+5)+6. \] Expanding, \[ y= -\frac{1}{3}x-\frac{5}{3}+6. \] Write 6 as \(\frac{18}{3}\): \[ y=-\frac{1}{3}x-\frac{5}{3}+\frac{18}{3}=-\frac{1}{3}x+\frac{13}{3}. \] So, the equation of the perpendicular line is \[ y=-\frac{1}{3}x+\frac{13}{3}. \] **Step 4. Find the slope of the line parallel to the given line.** Lines that are parallel have the same slope, so the slope of the parallel line is \[ m=3. \] **Step 5. Write the equation of the parallel line through \((-5,6)\).** Again, applying the point–slope form: \[ y-6=3(x+5). \] Solve for \(y\): \[ y=3(x+5)+6. \] Expanding, \[ y=3x+15+6=3x+21. \] Thus, the equation of the parallel line is \[ y=3x+21. \] **Final Answers:** - Perpendicular line: \(\displaystyle y=-\frac{1}{3}x+\frac{13}{3}\). - Parallel line: \(\displaystyle y=3x+21\).

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Beyond the Answer

To find the equations of the lines, we first need to determine the slope of the original line. If the equation of the original line is in the form \( y = mx + b \), the slope \( m \) can be used to find both the perpendicular and parallel lines. The slope of a line perpendicular to the original line is the negative reciprocal of \( m \). If \( m \) is the slope of the original line, then the perpendicular line will have a slope of \( -\frac{1}{m} \). Using the point \( (-5,6) \), we can apply the point-slope form \( y - y_1 = m(x - x_1) \). Substituting the values, we can derive the equation for the perpendicular line. For the parallel line, it will share the same slope \( m \) as the original line. Thus, using the same point \( (-5,6) \) and the slope \( m \), we can again utilize the point-slope form to find this line's equation. Once calculated, these equations will uniquely describe the lines with the desired orientations through the specified point!

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