Aline intersects the points (-23, -17) and (-13, -7). find the slope of the line.

The slope of a line through points  and   is :



or 

, 

it is the same thing, BUT it it always y's over x's and always in the same order of 1 and 2:

don't write:

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The slope of the line through the points (-23, -17) and (-13, -7) is :




1