(1)Graph is a diagram to show relationship of two or more variables.
(2)Types of Graphs
(a) Bar Graphs
A bar graph is a representation of numbers using bars of uniform width. The length of the bars shows frequency.
Steps to draw bar graph:
Show frequencies on the y axis. Choose a proper scale starting from zero. End the scale at a value greater than the highest value of given frequencies. Show these frequencies on the Y axis using equal divisions.
Ans- Histogram of uniform width with given data is showing below:The required frequency polygon is showing below:-
ABCDEFGH is required frequency polygon.
A line graph which is a whole unbroken line is called a linear graph. The linear graph is presented below:-