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Click here to watch the video. Use the given conditions to write an equation for the line in point-slope form and general form. Passing through \( (4,-5) \) and perpendicular to the line whose equation is \( x-9 y-4=0 \) The equation of the line in point-slope form is (Type an equation. Use integers or fractions for any numbers in the equation.)

Ask by Bond King. in the United States
Mar 09,2025

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The equation of the line in point-slope form is \( y + 5 = -9(x - 4) \), and in general form, it is \( 9x + y - 31 = 0 \).

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To find the equation of the line, we first need to determine the slope of the given line \(x - 9y - 4 = 0\). Rearranging this to slope-intercept form \(y = mx + b\) gives us: \[ 9y = x - 4 \] \[ y = \frac{1}{9}x - \frac{4}{9} \] The slope of this line is \(\frac{1}{9}\). For a line that is perpendicular to this one, the slope will be the negative reciprocal, which is \(-9\). Now, using the point-slope form of the equation, which is \(y - y_1 = m(x - x_1)\), where \((x_1, y_1)\) is the point through which the line passes, we plug in \((4, -5)\) and the slope \(-9\): \[ y - (-5) = -9(x - 4) \] \[ y + 5 = -9(x - 4) \] Thus, the equation in point-slope form is: \[ y + 5 = -9(x - 4) \] For the general form, we can rearrange this to standard form \(Ax + By + C = 0\): \[ y + 5 = -9x + 36 \] \[ 9x + y - 31 = 0 \] Therefore, your final answers are: Point-slope form: \(y + 5 = -9(x - 4)\) General form: \(9x + y - 31 = 0\)

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