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Write an equation of the line that passes through the pair of points ( 1, - 9 ), ( - 8,9 )
To find the slope the coordinates can be inputted into (x2 - x1)/(y2-y1) (-8-1)/(9+9) -9/18 -.5 y=-.5x+b To find b input one of the coordinates into the equation -9=-.5(1)+b -9=-.5+b -8.5=b The final equation will be y=-.5x-8.5
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