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OpenStudy (anonymous):
The points 1,r and −3,1 lie on a line with slope −1 Find the missing coordinate r.
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OpenStudy (mrnood):
do youknow how to work out the slope of a line betwee 2 points?
OpenStudy (anonymous):
No can you teach me?
OpenStudy (mrnood):
|dw:1443312124889:dw| the slope is the steepness of the line it is calculated from the 2 points like this: \[slope = \frac{ y _{2}-y _{1} }{ x _{2}-x _{1} }\]
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