From analyzing the data we obtain a relation which is expressed in the form of a mathematical formula. The mathematical equations and their graphs are a great help in understanding and handling the concepts. Use in this visual the data obtained from the pendulum.  
The values of the independent variable are usually placed on the X axis (abscissa) and those of the dependent variable on the Y axis (ordinate, because its  value is "ordered" by the independent one).

Carry out this activity - (an example of how the process of analysis can be used in kinematics)