Coordinate Geometry

Coordinate Geometry

1. Cartesian plane

   • It is denoted by ( x,y )
     • X coordinate is called abscissa
       • It is the horizontal line 
     • Y coordinate is called ordinate
       • It is the vertical line 
   • The point of intersection of the axes is called origin

2. If x ≠ y , then ( x,y ) ≠ ( y,x ) , and ( x,y ) = ( y,x ) , if x = y

3. Fixed point is called origin ( 0,0 )

   • -ve x axis (-x , 0 ) moves towards left
   • +ve x axis ( +x , 0 ) moves towards right
   • -ve y axis ( -y , 0 ) moves downwards
   • +ve y axis ( +y, 0 ) moves upwards

4. The coordinate axes divide the plane into four parts called quadrants