Frequency Polygon

Definition & Construction

Frequency Polygon

Definition

A line graph which joins the mid-point of the class interval containing in X-axis and the corresponding frequencies containing in Y-axis is called frequency polygon. In frequency polygon, the line is connected with the help of scale.

Steps of constructing frequency polygon

(a)
Draw X- and Y- axis in the graph paper.
(b)
Put the mid-value of class interval in X-axis and corresponding frequency in Y-axis with a suitable measurement.
(c)
Draw the mid-value and the corresponding frequency in the graph and join them respectively.
(d)
Take a lowest class-interval in left side and a highest class-interval in right side with the same scale. And then, take the mid-value of these extreme class-intervals and join them. Then, we can get the required frequency polygon.
Practice

Draw Frequency Polygon

📋 Given Data
✏️ Solution Table
Weight Mid-value Frequency Points
(Mid-value, Frequency)
Frequency Polygon

Click on the graph to plot your points.