if the slope the line joining the points (1,-1) and (k,5) is -2 then what is the value of k ?
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Slope= y2-y1/x2-x1
-2=5+1/k-1
-2=6/k-1
Cross multiplication
-2k+2=6
-2k=4
K= -2
-2=5+1/k-1
-2=6/k-1
Cross multiplication
-2k+2=6
-2k=4
K= -2
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