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Mathematics 12 Online
OpenStudy (anonymous):

Find the missing coordinate? (12,10),(-2,r) m=-4

OpenStudy (helder_edwin):

remember the formula for the slope: \[\large m=\frac{y_1-y_2}{x_1-x_2} \] so u have the equation \[\large -4=\frac{10-r}{12-(-2)} \]

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