Use the given conditions to write an equation for the line in point-slope form and in slope-intercept form. Passing through \( (8,-7) \) and perpendicular to the line whose equation is \( y=\frac{1}{5} x+4 \) Write an equation for the line in point-slope form. (Simplify your answer. Use integers or fractions for any numbers in the equation.) Write an equation for the line in slope-intercept form. \( \square \) (Simplify your answer. Use integers or fractions for any numbers in the equation.)
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To find the equation of the line passing through the point \( (8, -7) \) and perpendicular to the line given by \( y = \frac{1}{5} x + 4 \), we first determine the slope of the new line. Since the given line has a slope of \( \frac{1}{5} \), the slope of the line that is perpendicular to it will be the negative reciprocal. Therefore, the slope of the new line is \( -5 \). **Point-slope form**: The point-slope form of a line is given by the equation: \[ y - y_1 = m(x - x_1) \] Plugging in the point \( (8, -7) \) and the slope \( -5 \), we have: \[ y - (-7) = -5(x - 8) \] This simplifies to: \[ y + 7 = -5(x - 8) \] **Slope-intercept form**: To convert this to slope-intercept form \( y = mx + b \), we distribute the \( -5 \): \[ y + 7 = -5x + 40 \] Now, bring \( 7 \) to the other side: \[ y = -5x + 40 - 7 \] Simplifying further gives us: \[ y = -5x + 33 \] So, the equations are: Point-slope form: \( y + 7 = -5(x - 8) \) Slope-intercept form: \( y = -5x + 33 \)