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Give the equation of a line that goes through the point \( (-2,-6) \) and is parallel to the line \( -7 x-2 y=-4 \).

Ask by Carrillo Brooks. in the United States
Feb 22,2025

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Tutor-Verified Answer

Answer

The equation of the line is \( y = -\frac{7}{2}x - 13 \).

Solution

Step 1. Find the slope of the given line. The equation provided is –7x – 2y = –4. To find the slope, solve for y:   –2y = 7x – 4   y = (–7/2)x + 2 Thus, the slope of the given line is –7/2. Step 2. Use the point-slope form. Because parallel lines have the same slope, the new line will also have a slope of –7/2 and must pass through (–2, –6). The point-slope form is:   y – y₁ = m (x – x₁) Substituting in the values:   y – (–6) = (–7/2)(x – (–2))   y + 6 = (–7/2)(x + 2) Step 3. Simplify to slope-intercept form. Distribute (–7/2) to (x + 2):   y + 6 = (–7/2)x – 7 Subtract 6 from both sides:   y = (–7/2)x – 7 – 6   y = (–7/2)x – 13 Thus, the equation of the line is:   y = (–7/2)x – 13 Step 4. Alternative standard form (optional). To express in standard form, multiply the entire equation by 2:   2y = –7x – 26 Bring all terms to one side:   7x + 2y = –26 Either form is acceptable as the final answer.

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The Deep Dive

To find the equation of a line parallel to the given line, we first need to determine the slope of the original line. We can rewrite the equation \( -7x - 2y = -4 \) in slope-intercept form (y = mx + b). Starting with the given equation, we isolate \( y \): \[ -2y = 7x - 4 \\ y = -\frac{7}{2}x + 2 \] The slope \( m \) of the given line is \( -\frac{7}{2} \). Since parallel lines share the same slope, our new line will also have a slope of \( -\frac{7}{2} \) and will pass through the point \( (-2, -6) \). Using the point-slope form of the equation of a line, \( y - y_1 = m(x - x_1) \): \[ y - (-6) = -\frac{7}{2}(x - (-2)) \\ y + 6 = -\frac{7}{2}(x + 2) \\ y + 6 = -\frac{7}{2}x - 7 \\ y = -\frac{7}{2}x - 13 \] Thus, the equation of the line that goes through the point \( (-2, -6) \) and is parallel to the given line is: \[ y = -\frac{7}{2}x - 13 \]

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