Page 222 - Maths Skills - 8
P. 222

220                                                                                                  Maths














                                                    MIND MAP





                                           Introduction to Graphs









           Location of a Point in  x–y  Plane

                                  Y-axis



                                                 Point                     Sign Convension
                                             p (a, b)
                             (o, b)                                                         Y-axis

                                               Ordinate
                                    abscissa
                                                                               II: Quadrant    I: Quadrant
           X '                   o  (o, o)  (a, o)       X-axis                    (–, +)         (+, +)
                        Origin
                                                                           X '               o              X-axis
                                     here, a    abscissa of coordinate
                                               b    ordinate of coordinate     III: Quadrant   IV: Quadrant
                                                                                   (–, –)         (+, –)



                                  Y  '                                                      Y '













                       “A graph shows the relationship between x and y coordinates of the points”.
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