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Mathematics 15 Online
OpenStudy (anonymous):

The points 1,r and −3,1 lie on a line with slope −1 Find the missing coordinate r.

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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