Page 36 - Mathematics Class - IX

Viva-Voce

1. Name the horizontal and vertical lines drawn on the Cartesian plane.
Ans. X-axis and Y-axis, respectively.
2. What is abscissa?
Ans. Distance of a point in a Cartesian plane from the Y-axis is known as abscissa.

3. By which name do you know the point where two axes intersect?
Ans. Origin.
4. What is the ordinate of any point which lies on X-axis?
Ans. 0 (zero).

5. On which axis does the point (0, a) lie on the Cartesian plane?
Ans. On Y-axis.
6. What is the mirror image of (5, –3) with respect to X-axis?
Ans. (5, 3)

7. What is the mirror image of (5, –3) with respect to Y-axis?
Ans. (–5, –3)

MCQs

1. Point (–3, 5) lies in the
a) first quadrant b) second quadrant
c) third quadrant d) fourth quadrant

2. Signs of the abscissa and ordinate of a point in the second quadrant are respectively
a) +, + b) –, – c) –, + d) +, –
3. Point (0, –7) lies

a) on the X-axis b) in the second quadrant
c) on the Y-axis d) in the fourth quadrant
4. Point (– 10, 0) lies
a) on the negative direction of the X-axis b) on the negative direction of the Y-axis
c) in the third quadrant d) in the fourth quadrant

5. Abscissa of all the points on the X-axis is
a) 0 b) 1 c) 2 d) any number

Answers: 1. b) second quadrant 2. c) –, + 3. c) on the Y-axis
4. a) on the negative direction of the X-axis 5. d) any number

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