Q.1. Is it correct that if any point on the Xaxis, then the ycoordinate will be zero?
Yes, because the distance from Xaxis is zero.
Q.2. In cartesian plane, the angle between two axes is not always!90°.
False, the angle between two axes is always 90°.
Q.3. Is the point (7,2), same as point (2,7)?
No, in coordinates of a point, their order matters, so (7,2) is not same as (2, – 7).
Q.4. A point ( 2, 6) lies in which quadrant?
Third quadrant
Q.5. What is the image of ( 1, 4) in 3rd quadrant?
(1,4)
Q.6. What type of graph do you get for y = – 2?
A straight line parallel to Xaxis at a distance of 2 units from origin below the Xaxis.
Q.7. What do you mean by a cartesian system?
The system used to describe the position of a point in a plane, is called cartesian system.
Q.8. What is the condition that linear equation ax + by = c, c ≠ 0 perpendicular to any one of the axis?
The linear equation ax + by = c is perpendicular to any one of the axis, if either a = 0 or b = 0.
Q.9. Find the new coordinates of a point (2, 3), when we rotate the axes at 180° in anticlockwise direction.
When we rotate the axes, the positive X and Yaxes will become negative. So, the new coordinates will be (2, 3).
Q.10. In cartesian system, Xaxis and Yaxis divide the graph paper in how many quadrants?
Four quadrants
Q.11. What type of graph do you get forx = – 2?
A straight line parallel to Yaxis at a distance of 2 units from origin lying in the left side of Yaxis.
Q.12. What is the image of ( 3, 1) in 2nd quadrant?
(3,1)
Q.13. What is the ordinate of point lying in third quadrant at a distance of 2 units from Xaxis and 5 units from Yaxis?
– 2, because is third quadrant ycoordinate is negative.
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