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




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.



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.




Share this page: What’s this?

Recent Articles

  1. What is Area in Maths? | Units to find Area | Conversion Table of Area

    Jul 17, 25 01:06 AM

    Concept of Area
    The amount of surface that a plane figure covers is called its area. It’s unit is square centimeters or square meters etc. A rectangle, a square, a triangle and a circle are all examples of closed pla…

    Read More

  2. Worksheet on Perimeter | Perimeter of Squares and Rectangle | Answers

    Jul 17, 25 12:40 AM

    Most and Least Perimeter
    Practice the questions given in the worksheet on perimeter. The questions are based on finding the perimeter of the triangle, perimeter of the square, perimeter of rectangle and word problems. I. Find…

    Read More

  3. Formation of Square and Rectangle | Construction of Square & Rectangle

    Jul 16, 25 11:46 PM

    Construction of a Square
    In formation of square and rectangle we will learn how to construct square and rectangle. Construction of a Square: We follow the method given below. Step I: We draw a line segment AB of the required…

    Read More

  4. Perimeter of a Figure | Perimeter of a Simple Closed Figure | Examples

    Jul 16, 25 02:33 AM

    Perimeter of a Figure
    Perimeter of a figure is explained here. Perimeter is the total length of the boundary of a closed figure. The perimeter of a simple closed figure is the sum of the measures of line-segments which hav…

    Read More

  5. Formation of Numbers | Smallest and Greatest Number| Number Formation

    Jul 15, 25 11:46 AM

    In formation of numbers we will learn the numbers having different numbers of digits. We know that: (i) Greatest number of one digit = 9,

    Read More