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Introduction to frequency polygon:
Linking of the all the center points of the top of the bars of a histogram in the line graph is the frequency polygon. Two final point of the line in the x axis is always the frequently polygon. The origin of the frequency polygon is the o. let we see the detailed explanation of the frequently polygon.

Frequency Polygon:

The frequency polygon to use to know the distribution of the shapes is graphical device. But are particularly helpful in evaluate sets of information also provide the similar purpose as histograms .To create frequency distributions used the good option is the frequency polygon.
To make a frequency polygon, begin now as for histograms, by decide a class interval. In your data the range of the score is point out to the x-axis. The frequency class is representing as the y axis and makes it with the center value indicating by the group. Draw the Y-axis to point to the frequency of all class. Position a point in the center of all class intervals at the height matching to its frequency.
Lastly, attach the points. You must containing single class interval under the lowly value in your information and one above the uppermost value.

Example of the Frequency Polygon:

Example :
The 642 psychology analysis scores for frequency polygon. The starting point of the x axis value is the 40. This indicating the interval expands from 30 to 40.Need to be Step forward to math Since the smallest analysis scores is 50, this frequency interval is the 0. The position 45 represents the interval from the 40 to 50.