Verify that the points (1, 5), (2, 3) and (–2, –1) are collinear or not​

1 thought on “Verify that the points (1, 5), (2, 3) and (–2, –1) are collinear or not​”

1. Answer:

   It is not a collinear.

   Step-by-step explanation:

   (1, 5), (2, 3), (-2, -1)

   (x1, y1) (x2, y2) (x3, y3)

   1/2[x1(y2-y3)+x2(y3-y1)+x3(y2-y1)]

   =1/2[1(3-(-1))+2(-1-5)+(-2)(3-5)]

   =1/2[1(3+1)+2(-6)-2(-2)]

   =1/2[1(4)-12+4]

   =1/2[4-8]

   =1/2[-4]

   =-4/2

   =-2.

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