Discuss important steps to represent data with the help of pie-diagram.
Important steps:
1. Arrange the data in an ascending order.
2. Calculate the degrees of angles showing the given values.
3. Plot the data dividing the circle into the required number of divisions.
4. Select a suitable radius for the circle to be drawn.
5. Draw a line from the centre of the circle to the arc as a radius.
6. Measure the angles from the arc of the circle for each category of vehicle in an ascending order clockwise starting with smaller angle.