Types of Line Graphs in Logical Reasoning

Line Graph

Individual data values are recorded as markers in both line graphs and scatterplots. The way the line is drawn differs between these two formats. In line graphs, the line is drawn by connecting each individual data point to highlight local changes. This allows the viewer to see the local change from point to point.

This is done when it’s crucial to see the local difference between the two spots. Although an overall trend can be seen, it is connected by a local trend between an individual or small groups of points. In contrast, the scatterplot’s line does not connect individual points but rather illustrates the data’s trend.

Types of Line Graphs

Line graphs are of three types which are as follows:

• Simple Line Graph
• Multiple Line Graph
• Compound Line Graph

Simple Line Graph

A graph that is created with the use of only one line is called a simple line graph.

In many scenarios, there are two variables, and the output of one variable is dependent on the output of the other variable. That is, one of the variables is independent, and the other is dependent on it. In many cases, time is considered the independent variable, but it can vary from situation to situation.

For example, if a salary of a group of employees is plotted using a Simple Line Graph, the year (time) is the independent variable, and the salary will be the dependent variable. This example shows the yearly salary over a n-number of years.

Multiple Line Graph

A graph that depicts change with the use of more than one line is called a multiple line graph. It is used to represent more than two variables that change in the same time interval.

To increase the graph’s readability, the independent variable is measured on the horizontal axis of the coordinate plane. Then the multiple dependent variables are placed on the graph’s vertical axis.

For example, if we want to compare the change in temperature and pressure of a vessel over time, we will have to use a multiple graph.

Compound Line Graph

A Compound Line Graph is a type of line graph/line chart applied when the information can be divided into various types. It is developed on a single line graph which depicts the trend in the total sample space and the layers that make up the data.

The components of the total are depicted with the help of lines. In the compound line graph, the topmost is used to display the total, and the lower line is used to display the parts of the total. The area that separates the two lines gives the component’s contribution to the total.

A compound line graph starts as a multiple line graph, and then the different parts of it are shaded to give an idea of the component each data holds in the total. The result is a compound line graph.

Different Parts of Line Graph

There are five different parts in a line graph; they are as follows:

Title

The title of the line graph is which tells us about the graph. It is the same as the title of a book, title of a journal, title of an article, etc. It is the graph’s description.

With the title of the graph, one can tell what content the graph holds, the data that the graph represents and what form of a conclusive result the graph will give.

Scale

The scale of the graph describes the count of units required to define each point on the graph. Therefore, it is imperative to write the scales used to construct the graph, which makes the readability of the graph easy for the third party to interpret the graph.

Most graphs are drawn on paper or generated using software like Excel. If there is no scale, it would be impossible to differentiate between graphs that are made from large values or if there are graphs that use different measurements. Therefore, it is essential to mention the scale on the graph.

Points

Points in a graph are also known as data points, which depict the value of each data in the graph. In the graph, multiple data points refer to various statistics over time.

Labels

Every axis on the graph provides the depiction of data on it, and this is mentioned in the label given to each axis. In a typical coordinate plane graph, the X-axis is the horizontal axis, whereas the Y-axis is the vertical axis.

There are two types of labels, namely horizontal labels and vertical labels. The horizontal label describes the data on the x-axis, and the vertical label describes the data on the y–axis.

Line

The formation of a graph begins with the plotting of points. After the points are plotted, they are connected to each other with the help of a line. Often with a vast number of points, the line becomes the graph itself and better depicts the trends between the points.

Conclusion

A line graph joins data points that represent the changes that occur in a given experiment over a time interval. A line graph is drawn on a coordinate plane that can be described with the use of the x and y axes.

Linear graph and line chart are other synonyms of the line graph. The x-axis in the graph is referred to as the independent axis, and the y-axis in the graph is referred to as the dependent axis.