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:

**1.** 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 |

**2.**

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.

**● Statistics**

about The Math.