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OpenStudy (anonymous):
Determine whether the lines through the given pairs of points are parallel. A (2, - 3), B (- 2, - 11) and C (1, 2), D (- 1, 6)
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OpenStudy (anonymous):
Hey! Try calculating the slope of the line joining the two points (i.e. m=(y-y_1)/(x-x_1)). If the slopes are equal then they are parallel. :)
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