Line Graph

Bar graphs are used to compare changes between different groups. Line graphs are used to compare two variables.

The data which changes over a period of time can be displayed through a line graph.

In line graph:

Points are plotted on the graph related to two variables

Points are joined by the line segments.

How to Construct a Line Graph?

Steps of construction of line graph:

On a graph, draw two lines perpendicular to each other intersecting at O. The horizontal line is x-axis and vertical line is y-axis. Mark points at equal intervals along x-axis and write the names of the data items whose values are to be marked.

Along the y-axis, choose an appropriate scale considering the given values.

Now, make the points

Join each point with the successive point using a ruler. Thus, a line graph is obtained


Solve Examples on Line Graph:

For example a line graph given below shows how Elizabeth's height changes as she grows.

1. Given below is a line graph showing the height changes in Elizabeth as she grows. Observe the graph and answer the questions below.

Line Graph

(i) What was the height of Elizabeth at 8 years?

Answer: 65 inches


(ii) What was the height of Elizabeth at 6 years?

Answer:  50 inches


(iii) What was the height of Elizabeth at 2 years?

Answer: 35 inches


(iv) How much has Elizabeth grown from 2 to 8 years?

Answer: 30 inches


(v) When was Elizabeth 35 inches tall?

Answer: 2 years.


2. The following table gives the information of the sum scored by McKay in 10 matches. Represent this information using line graph.


Match 1 2 3 4 5 6 7 8 9 10
Runs Scored 80 30 50 90 40 60 75 20 15 90

Line Graph

3. Mobile phones sold by a shop in a certain week are as follows:


Days Mon. Tues. Wed. Thurs. Fri. Sat.
No. of Mobile Phones Sold 20 16 12 24 4 10

Represent the above data by a line graph.

Line Graph Picture

Questions and Answers on Line Graph:

1. Given below is a line graph showing the sale of books in different months.

Problems on Line Graph

Observe the graph and answer the questions below.

(i) How many books are sold in the month of July?

(ii) In which of the months maximum numbers of books were sold?

(iii) In which of the months minimum numbers of books were sold?

(iv) How many books were sold in the first 3 months of the year?

(v) What was the decrease in the sale from May to June? 


Answers:

(i) 30

(ii) May

(iii) January

(iv) 105

(v) 25

Statistics





From Line Graph to HOME PAGE


New! Comments

Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.



Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.



Share this page: What’s this?

Recent Articles

  1. Method of H.C.F. |Highest Common Factor|Factorization &Division Method

    Apr 13, 24 05:12 PM

    HCF by Short Division Method
    We will discuss here about the method of h.c.f. (highest common factor). The highest common factor or HCF of two or more numbers is the greatest number which divides exactly the given numbers. Let us…

    Read More

  2. Factors | Understand the Factors of the Product | Concept of Factors

    Apr 13, 24 03:29 PM

    Factors
    Factors of a number are discussed here so that students can understand the factors of the product. What are factors? (i) If a dividend, when divided by a divisor, is divided completely

    Read More

  3. Methods of Prime Factorization | Division Method | Factor Tree Method

    Apr 13, 24 01:27 PM

    Factor Tree Method
    In prime factorization, we factorise the numbers into prime numbers, called prime factors. There are two methods of prime factorization: 1. Division Method 2. Factor Tree Method

    Read More

  4. Divisibility Rules | Divisibility Test|Divisibility Rules From 2 to 18

    Apr 13, 24 12:41 PM

    Divisibility Rules
    To find out factors of larger numbers quickly, we perform divisibility test. There are certain rules to check divisibility of numbers. Divisibility tests of a given number by any of the number 2, 3, 4…

    Read More

  5. Even and Odd Numbers Between 1 and 100 | Even and Odd Numbers|Examples

    Apr 12, 24 04:22 PM

    even and odd numbers
    All the even and odd numbers between 1 and 100 are discussed here. What are the even numbers from 1 to 100? The even numbers from 1 to 100 are:

    Read More