CORE Coordinate Geometry and Transformations - New Indian ...

OX and OY are called the positive directions of x-axis and the y-axis, respectively.
Similarly, OX‟ and OY‟ are called the negative directions of the x-axis and the y-axis,
respectively.
Coordinates of a Point
Distance of any point, say P, from the y-axis is
called the x-coordinate of the point and the
distance of this point from the x-axis is called
its y-coordinate.
If these coordinates are x and y respectively,
then the point P is written as P(x,y). (Fig. 2)
Fig. 2
Points in different Quadrants
In quadrant I, both the coordinates x and y
are measured along the positive directions
of x and y axes, and hence both are
positive. So, the point like P (3, 4), Q(1,3)
etc lie in quadrant I (See Fig 3)
16
Fig. 3