GMAT GRE 1st Grade 2nd Grade 3rd Grade 4th Grade 5th Grade 6th Grade 7th grade math 8th grade math 9th grade math 10th grade math 11th grade math 12th grade math Precalculus Worksheets Chapter wise Test MCQ's Math Dictionary Graph Dictionary Multiplicative tables Math Teasers NTSE Chinese Numbers CBSE Sample Papers 
Frequency polygonCovid19 has led the world to go through a phenomenal transition . Elearning is the future today. Stay Home , Stay Safe and keep learning!!! Frequency polygon is another way to show the information in a frequency table. It looks a little bit like a line graph. To make a frequencypolygon, you just need to plot a few points and then join the points by straight lines.Frequencypolygon of a given frequency distribution can be drawn in two ways. 1) By using histogram 2) Without using histogram After drawing a histogram, obtain the midpoints of each class. The midpoint of a class is the point in the middle of the class. So for instance, if I have a class “10 – 19", then the midpoint is ( 10+19)/2 = 14.5. A class of “0 – 5" has a midpoint of 2.5. Join these mid points of the adjacent rectangles of the histogram by dotted line segments. Obtain the mid points of two class intervals of zero frequency on Xaxis, one adjacent to the first, on its left and one adjacent to the last, on its right. These classintervals are known as imagined class intervals. Note : Sometimes imagined class intervals do not exist. For example marks obtained by the students in a test, we can not go below zero and beyond maximum marks on the two sides. In such cases extreme linesegments are partly drawn and are brought down vertically so that they meet with the vertical sides of first and the last rectangles. Example without using histogram :
Note: Class marks are obtained by adding the age in years and divide it by 2. Graph Dictionary Home Page Covid19 has affected physical interactions between people. Don't let it affect your learning.
More To Explore

