(overrightarrowX"OX) and (overrightarrowY"OY) represent the co-ordinate axes. The ray (overrightarrowOX) istaken as positive x-axis. So, any distance along (overrightarrowOX) will be taken as positiveand the ray (overrightarrowOX") is taken as negative x-axis. So, any distance move along (overrightarrowOX")will be taken as negative.

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Similarly, ray (overrightarrowOY) taken as positive y-axis. So, the distancemoved along (overrightarrowOY) will be taken as positive and (overrightarrowOY") is taken as negative y-axis.So, the distance moved along (overrightarrowOY") will be taken as negative.

| The graph will help us tounderstand the convention of the signs of coordinates. (i) The co-ordinates of any point lies in the first quadranthave both the abscissa and ordinate are positive i.e. (+, +).
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