Dot Plot

Definition of Dot Plot

In a Dot Plot, a set of data is represented by using dots over a number line.

More About Dot Plot

    The number of dots over the number line tells the value of the data points.

Examples of Dot Plot

     example of  Dot Plot
    A dot plot is as shown in the figure.
    The frequency of the data points is represented by the dots.

Video Examples: MS 7 Math Comparing Box Plots


Solved Example on Dot Plot

Ques: The number of various kinds of snakes found in a zoo is shown in the dot plot. What is the total number of snakes in the zoo?

     example of  Dot Plot
    Choices:
    A. 29
    B. 25
    C. 30
    D. 34
    Correct Answer: A

Solution:

    Step 1: The number of snakes of a particular kind in the zoo is indicated by the number of dots above the name of the snake in the dot plot.
    Step 2: From the plot, the number of Black cobras, Pythons, Anacondas, Rattlesnakes and Green cobras in the zoo are 4, 5, 2, 10 and 8 respectively. [Count the number of dots over each snake name.]
    Step 3: The total number of snakes in the zoo = 4 + 5 + 2 + 10 + 8 = 29 [Add the number of snakes of each kind.]
    Step 4: So, there are a total of 29 snakes in the zoo.