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Mathematics 18 Online
OpenStudy (anonymous):

Reason out using slopes that A(-3,-9); B(1,-3) and C(7,6) are lying on the same straight line.

OpenStudy (anonymous):

find out the slope of the line passing through A and B. Find out the slope of the line through B and C. Find out the slope of the line passing through A and C. If all three slopes are the same, all three points lie on the same line.

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