NCERT Mathematics Class 9 Exemplar Ch 3 Coordinate Geometry Part 7

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Q.4. Plot the following points and check whether they are collinear or not:

(i)

(ii)

(iii)

Figure shows points are collinear or not

Figure Shows Points Are Collinear or Not

Figure shows points are collinear or not

Answer: (i) Collinear

(ii) Not collinear

Figure shows points are collinear or not

Figure Shows Points Are Collinear or Not

Figure shows points are collinear or not

(iii) Collinear

Q.5. Without plotting the points indicates the quadrant in which they will lie, if

(i) Ordinate is 5 and abscissa is – 3

(ii) Abscissa is – 5 and ordinate is – 3

(iii) Abscissa is – 5 and ordinate is 3

(iv) Ordinate is 5 and abscissa is 3

Answer: (i) The given point is Here, abscissa is negative and ordinate is positive, so it lies in II quadrant.

(ii) The given point is . Here, abscissa is ordinate and both are negative, so it lies in III quadrant.

(iii) The given point is . Here, abscissa is negative and ordinate is positive, so it lies in II quadrant.

(iv) The given point is . Here, abscissa is ordinate and both are positive so it lies in I quadrant.

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