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Mathematics
Semaj Shepard
2 September, 11:34
Through (-3,-1) and perpendicular to y = - 2/5-4
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Zoey Ware
2 September, 12:41
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Y=5/2x+6.5 because a line perpendicular to another line has a slope that is the negative reciprocal of the line it intersects. The negative reciprocal of - 2/5 is 5/2. Then you plug in the coordinate (-3, - 1) in order to find the value of b in the equation y=mx+b. The equation becomes - 1=5/2 (-3) + b. 5/2 (-3) = - 15/2=-7.5. The new equation is - 1=-7.5+b. To isolate b you would add 7.5 to - 1 which equals 6.5, so b=6.5. Then you plug that back into the equation and you would have y=5/2x+6.5
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