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# Ex 3.3 NCERT Solutions - Coordinate Geometry Class 9 Notes | EduRev

## Mathematics (Maths) Class 9

Created by: Full Circle

## Class 9 : Ex 3.3 NCERT Solutions - Coordinate Geometry Class 9 Notes | EduRev

The document Ex 3.3 NCERT Solutions - Coordinate Geometry Class 9 Notes | EduRev is a part of the Class 9 Course Mathematics (Maths) Class 9.
All you need of Class 9 at this link: Class 9

Question 1. In which quadrant or on which axis do each of the points (â€“2, 4) (3, â€“1), (â€“1, 0), (1, 2) and (â€“3, â€“5) lie? Verify your answer by locating them on the Cartesian plane.
Solution: In the point (â€“2, 4), the abscissa is negative and the ordinate is positive.
âˆµ (â€“, +) belongs to 2nd quadrant.
âˆ´ (â€“2, 4) lies in the second quadrant.
The point (3, â€“1) is having +ve abscissa and â€“ve ordinate.
âˆ´ (3, â€“1) lies in the 4th quadrant.
The point (â€“1, 0) is having (â€“ve) abscissa and ordinate on the x-axis.
âˆ´ The point (â€“1, 0) lies on the negative x-axis.
The point (1, 2) is having the x-coordiante as well as y-coordinate +ve.
âˆ´ Point (1, 2) lies in the 1st quadrant.
The point (â€“3, â€“5) is having the abscissa as well as ordinate negative.
âˆ´ Point (â€“3, â€“5) lies in the 3rd quadrant.
These points are plotted in the Cartesian plane as shown in the following figure as A(â€“2, 4); B(3, â€“1); C(â€“1, 0); D(1, 2) and E(â€“3, â€“5).

Question 2. Plot the points (x, y) given in the following table on the plane, choosing suitable units of distance on the axes.

 x -2 -1 0 1 3 y 8 7 -1.25 3 -1

Solution: The given points are (â€“2, 8), (â€“1, 7), (0, â€“1.5), (1, 3) and (3, â€“1). To plot these points:

(i) We draw X'OX and YOY' as axes.
(ii) We choose suitable units of distance on the axes.
(iii) To plot (â€“2, 8), we start from O, take (â€“2) units on x-axis and then (+8) units on y-axis.
We mark the point as A(â€“2, 8).
(iv) To plot (â€“1, 7), we start from 0; take (â€“1) units on x-axis and then (+7) units on the yaxis. We mark the point as B(â€“1, 7).
(v) To plot (0, â€“1.25), we move along 1.25 units below the x-axis on the y-axis and mark the point as C(0, â€“1.25).
(vi) To plot (1, 3), we take (+1) unit on the x-axis and then (+3) units on the y-axis. We mark the point as D(1, 3).
(vii) To plot (3, â€“1), we take (+3) units on the x-axis and then (â€“1) unit on the y-axis. We mark the point E(3, â€“1).

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