Line Graph, How to Draw a Line Graph

# Line Graph, How to Draw a Line Graph

Line Graph

If the set of data varies with time, we generally use a line graph to represent them. In a line graph, the data are usually plotted against time and each pair of adjacent data points is joined by a straight line segment. The main advantage of using a line graph to represent data is that we can observe the trend of the movement of data.

## How to Draw a Line Graph?

Example 1: The following table shows the jeans manufactures by a company in 5 consecutive days of a month.

 Days Mon Tue Wed Thu Fri No. of jeans 3154 3130 3115 3125 3150

Draw a line graph to represent the above data.

Solution: The line graph of the data is shown below.

## Linear Graph

If the line graph drawn is a single straight line, then the graph is called a linear graph.

## How to Draw a Linear Graph?

To draw a linear graph, we need to locate some points on the graph paper. We know how to plot the points on a graph paper. Join these points. If the line joining these points is a straight line, then it is a linear graph.

Example 2: The following table shows the distance travelled by a car using the given petrol.

 Petrol (in litre) 1 2 3 4 5 Distance travelled (in km) 10 20 30 40 50

Draw a linear graph to represent the above data.

Solution: To represent the given data using a linear graph, let 1 unit = 1 litre on x-axis and 1 unit = 10 km on the y-axis.

Note:
A linear graph is always a line graph but a line graph may or may not be a linear graph.

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