kwizNET Subscribers, please login to turn off the Ads!
Email us to get an instant 20% discount on highly effective K-12 Math & English kwizNET Programs!

Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Middle/High School Algebra, Geometry, and Statistics (AGS)
9.18 Frequency Polygon without Histograms

Frequency Polygons can be drawn independently without drawing the histograms.
In drawing a histogram of a given frequency distribution, we take the following steps:

Step 1. : If the frequency table is in the inclusive form, we first convert it into an exclusive form and make it a continuous interval.
Step 2. :To complete the polygon we assume a class interval with zero frequency preceding the first class interval and a class interval with zero frequency succeeding the last class interval.
Step 3. : Taking a suitable scale, we represent class marks along x axis.
Step 4. : Taking a suitable scale, we represent frequency along y axis.
Step 5. : We plot the corresponding points and join it with the help of line segment.
Consider the following example.
In a city, the following weekly observations were made in a study on cost of living index :

Following is the frequency polygon for the above data

Directions: On the basis of the given information answer the following questions

Q 1: Write down the corresponding class interval for the class mark 145.
140 - 150
150 - 160
170 - 180
160 - 170

Q 2: The upper limit for the lowest class interval is

Q 3: Which class interval has the lowest frequency?
190 - 200
140 - 150
180 - 190
170 - 180

Q 4: The maximum frequency corresponds to which class mark?

Question 5: This question is available to subscribers only!

Question 6: This question is available to subscribers only!

Subscription to kwizNET Learning System offers the following benefits:

  • Unrestricted access to grade appropriate lessons, quizzes, & printable worksheets
  • Instant scoring of online quizzes
  • Progress tracking and award certificates to keep your student motivated
  • Unlimited practice with auto-generated 'WIZ MATH' quizzes
  • Child-friendly website with no advertisements
  • Choice of Math, English, Science, & Social Studies Curriculums
  • Excellent value for K-12 and ACT, SAT, & TOEFL Test Preparation
  • Get discount offers by sending an email to

Quiz Timer