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? 


(i) 30

(ii) May

(iii) January

(iv) 105

(v) 25


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. Months of the Year | List of 12 Months of the Year |Jan, Feb, Mar, Apr

    Dec 01, 23 01:16 AM

    Months of the Year
    There are 12 months in a year. The months are January, February, march, April, May, June, July, August, September, October, November and December. The year begins with the January month. December is t…

    Read More

  2. Days of the Week | 7 Days of the Week | What are the Seven Days?

    Nov 30, 23 10:59 PM

    Days of the Weeks
    We know that, seven days of a week are Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday. A day has 24 hours. There are 52 weeks in a year. Fill in the missing dates and answer the questi…

    Read More

  3. Types of Lines |Straight Lines|Curved Lines|Horizontal Lines| Vertical

    Nov 30, 23 01:08 PM

    Types of Lines
    What are the different types of lines? There are two different kinds of lines. (i) Straight line and (ii) Curved line. There are three different types of straight lines. (i) Horizontal lines, (ii) Ver…

    Read More