NCERT Mathematics Class 9 Exemplar Ch 3 Coordinate Geometry Part 9

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Q.11. Find the coordinates of the point

(i) which lies on x and y axes both.

(ii) whose ordinate is – 4 and which lies on y-axis.

(iii) whose abscissa is 5 and which lies on x-axis.

Answer: (i) (0, 0) (ii) (0,– 4) (iii) (5, 0)

Taking 0.5 cm as 1 unit, plot points on the graph paper

Coordinate of the Point

Q.12. Taking 0.5 cm as 1 unit, plot the following points on the graph paper:

Answer: Here, in point A(1, 3) both x and y – coordinates are positive, so it lies in I quadrant. In point Bboth x and y - coordinates are negative, so it lies in III quadrant. In point ) x - coordinate is negative and y-coordinative is positive, so it lies in II quadrant. In point x - coordinate is zero, so it lies on Y-axis and in point Y coordinate is zero, so it lies on X -axis. On plotting the given points, we can get the graph.

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