Points collinear

Show that the point A(-1,3), B(3,2), C(11,0) are col-linear.

Correct result:

x =  1

Solution:

BA=(x1,y1) CA=(x2,y2)  x1=3(1)=4 y1=23=1  x2=11(1)=12 y2=03=3  k1=x2/x1=12/4=3 k2=y2/y1=(3)/(1)=3  k1=k2   3 (4,1)=(12,3) 3 BA=CA x=1



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