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Plotting a Point in the Plane if its Co-ordinates are Given

The x-co-ordinate (or abscissa) represents the directed distance from y-axis to the point, and the y-co-ordinate (or ordinate) represents the directed distance from x-axis to the point.
 
 


 

Note that if a point lies on x-axis, its y-co-ordinate is zero. For instance, see the points (-5, 0) and (2, 0) in the figure. Also, note that if a point lies on y-axis, then its x-co-ordinate is zero. For instance see the points (0, -4) and (0, 5) in the figure above.

The origin O has co-ordinates (0, 0). Now note that if two points A and B have the same y-co-ordinates, A and B must lie on the same horizontal line. For instance see points (0, -3) and (3, -3) in the figure above. Note that if the two points P and Q have the same x-co-ordinates, P and Q must lie on the same vertical line. For instance see points (-4,
ï€↑4) and (-4, -2) in the figure above.





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