Graph Introduction

Description:

• Graph is a pictorial representation of the relation between two quantities.

• Graph consist of two axis – x axis and y axis.

• The point of intersection of the axis is known as origin. All the counting starts from origin.

• Co-ordinates to the right of origin on the x axis are considered as positive, while on the left of origin are considered negative.

• Co-ordinates to Upwards from origin on the y axis are considered as positive, while in the downward direction of origin are considered negative.

• Axis divide the graph into four quadrants – I^st, II^nd, III^rd and IV^th

• In I^st quadrant, x co-ordinates are positive as well as y co-ordinates are positive.

• In II^nd quadrant, x co-ordinates are negative and y co-ordinates are positive.

• In III^rd quadrant, x co-ordinates are negative as well as y co-ordinates are negative.

• In IV^th quadrant, x co-ordinates are positive and y co-ordinates are negative.

While working with kinematics in graph, we follow a set of standards −

• Time is taken on the x axis.

• Quantity which has to be related with time is taken on y axis.

• To construct the graph, value pairs are taken by observing the relation between the quantities.

• Graph gives points showing relation among the quantities.