9.3 Quadrants
The xaxis and the yaxis divide the coordinate plane into four regions. These regions are called as Quadrants. They are shown in the following figure.
i) The upper right quadrant is the 1st quadrant. The values of x coordinate and y coordinate of any point in this quadrant is always positive. Its ordered pair is expressed as ( +, + ).
ii) The upper left quadrant is the 2nd quadrant. Here the value of the x coordinate is negative (measured left from the origin) but the value of the ycoordinate is always positive. The ordered pair is expressed as ( , + ).
iii) The lower left quadrant is the 3rd quadrant. The values of the xcoordinate and the ycoordinate are both nega tive here. The ordered pair is expressed as (, ).
iv) The lower right quadrant is the 4th quadrant. In this quadrant the xcoordinate has a positive value and the ycoordinate has a negative value. The ordered pair is expressed as ( +,  ).
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