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Use the given conditions to write an equation for the line in point-slope form and in slope-intercept form Passing through \( (8,6) \) with \( x \)-intercept -4 Write an equation for the line in point-slope form (Simplify your answer Use integers or fractions for any numbers in the equation )

Ask by Vaughan Weaver. in the United States
Feb 28,2025

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Answer

Point-Slope Form: \( y - 6 = \frac{1}{2}(x - 8) \) Slope-Intercept Form: \( y = \frac{1}{2}x + 2 \)

Solution

To find the equation of the line, follow these steps: Step 1: Identify two points on the line. • Given point: (8, 6) • x-intercept: (-4, 0) (since the x-intercept is the point where y = 0) Step 2: Calculate the slope (m). Use the formula:   m = (y₂ − y₁) / (x₂ − x₁) Substitute (8, 6) as (x₁, y₁) and (-4, 0) as (x₂, y₂):   m = (0 − 6) / (-4 − 8) = (−6) / (−12) = 1/2 Step 3: Write the equation in point-slope form. Using the point (8, 6):   y − 6 = 1/2 (x − 8) Step 4: Convert to slope-intercept form (y = mx + b). Start with:   y − 6 = 1/2 (x − 8) Distribute 1/2:   y − 6 = 1/2 x − 4 Add 6 to both sides:   y = 1/2 x + 2 Thus, the equations of the line are: Point-Slope Form: y − 6 = 1/2 (x − 8) Slope-Intercept Form: y = 1/2 x + 2

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Beyond the Answer

To find the equation of the line, we first need to determine the slope using the given points. The x-intercept is where \(y = 0\), and from the problem, we know the x-intercept is -4. So, the two points we have are \( (8, 6) \) and \( (-4, 0) \). The slope \(m\) is calculated as: \[ m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{0 - 6}{-4 - 8} = \frac{-6}{-12} = \frac{1}{2} \] Now, using the point-slope form \(y - y_1 = m(x - x_1)\) with point \( (8,6) \): \[ y - 6 = \frac{1}{2}(x - 8) \] This is the equation in point-slope form. To convert this to slope-intercept form \(y = mx + b\), we simplify: \[ y - 6 = \frac{1}{2}x - 4 \] \[ y = \frac{1}{2}x + 2 \] So, the equation of the line in point-slope form is: \(y - 6 = \frac{1}{2}(x - 8)\) And in slope-intercept form, it's: \(y = \frac{1}{2}x + 2\)

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