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Plot the following points and check whether they are collinear or not :

(i) (1, 3), (-1, -1) and (-2, -3)

(ii) (1, 2), (2, -1) and (-1, 4)

(iii) (0, 1), (2, -2) and (23,0)(\dfrac{2}{3} ,0).

Coordinate Geometry

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Answer

(i)

Plot the following points and check whether they are collinear or not : (i) (1, 3), (-1, -1) and (-2, -3). Coordinate Geometry, ML Aggarwal Understanding Mathematics Solutions ICSE Class 9.

Points (1, 3), (-1, -1) and (-2, -3) lie on a straight line, so they are collinear.

(ii)

Plot the following points and check whether they are collinear or not : (ii) (1, 2), (2, -1) and (-1, 4). Coordinate Geometry, ML Aggarwal Understanding Mathematics Solutions ICSE Class 9.

Points (1, 2), (2, -1) and (-1, 4) do not lie on a line. So they are non-collinear.

(iii)

Plot the following points and check whether they are collinear or not : (iii) (0, 1), (2, -2) and (2/3 ,0). Coordinate Geometry, ML Aggarwal Understanding Mathematics Solutions ICSE Class 9.

Points (0, 1), (2, -2) and (23,0)(\dfrac{2}{3} ,0) lie on a straight line, so they are collinear.

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