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Mathematics 9 Online
OpenStudy (anonymous):

Please help!!! I have tried everything and I am still getting it wrong. find the equation of the line with the given properties. Express the equation in general form or slope intercept form perpendicular to the line -3x+y=-30 contains the point (9,-4)

OpenStudy (ddcamp):

To find the slope of your line, start by putting the given line (-3x+y=-30) into slope-intercept (y=mx+b) form. The new slope is perpendicular to the first slope. This means that the slopes are negative reciprocals of each other. (If the slope of the first line is m, the perpendicular slope is -1/m). Once you have the perpendicular slope, use the point slope equation.

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