Double Line Graph Example – A double line chart is used to show continuous data, usually the growth of two trends over a period of time or some other fundamental. You can say that it is part of data interpretation because we use it to represent different kinds of data. A double line chart is also useful in studying and comparing the rate of change of two observations. In this article, we will know what double line graph is, where and why they are used and some questions with solutions to understand the concept of competitive exam questions.
A double line chart is an extension of the simple line chart and is also known as a Cartesian graph. A simple line chart is used to show the growth of a trend over time. On the other hand, Double Line Graph is used to show and compare the growth of two trends. They represent the variation of one parameter with respect to another parameter, each shown on a different axis for the two items.
Double Line Graph Example
See the following example, which shows trends in household savings and income over different years. X-axis represents years and Y-axis represents “000” rupees.
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A double line chart is used to compare changes or growth in two trends. Double line graphs are preferable when there are continuous data. For example, if you want to compare the change in sales growth of two companies from 2000 to 2020, you can use double line graphs. The graph consists of two lines, one for each of the two companies, whose rise and fall represent the growth of the companies they represent.
Comparing the rate of change of two things is also very useful. For example, you can use a double line graph to compare the speed of two cars over a specified time interval. See double line chart for better understanding.
It is very easy to create a double line chart when there are two parameter specifications to compare the same items/observations. Let’s create a graph using the following example.
Draw the x-axis and the y-axis. Mark the years equally spaced on the x-axis. Mark the scale of rupees at equal intervals on the Y-axis. The difference between all values must be the same. Now mark the points of sale in light blue on the graph for each year in front of the y-axis value proportional to the given values. Similarly, create profit points using dark blue. Once you have all the dots, draw a line for each of the sales and profits, connecting the dots in their respective colors. The double line diagram is ready. Be sure to note the name of the x-axis and y-axis and also the color code, meaning which color represents which element.
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Answer the questions based on the information below in the double line graph that shows the family’s savings and income over the years.
Question 2. What is the minimum ratio of family income and savings in given years?
Question 3. Which of the following years had the largest decrease in spending compared to the previous year?
Solution: From question 1, we know that in 2017, 2018 and 2019 the expenses have decreased compared to the previous year.
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Therefore, the percentage decrease in expenses compared to the previous year is the highest for 2018.
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Ans.1 A double line graph is an extension of a simple line graph and is also known as a Cartesian graph. Double Line Graphs are used to show and compare the growth of two trends. They represent the variation of one parameter with respect to another parameter, each shown on a different axis for the two items
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Ans.2 A simple line chart is drawn for only one point and it is used to show the change/growth of an item/trend over time. It is also used to show the variation of a parameter over time or with respect to another represented by some other fundamental two axes.
Ans.3 A multiple line graph is exactly like a double line graph, but here you can compare the change/growth of more than two categories in one graph.
Ans.4 Draw x and y axis. Mark the relevant parameters in the axes. Now plot the points on the graph using the given data. Connect the dots with a line. Mark the lines of the two categories with different colors to avoid confusion. For more insight, see the above article and learn how to draw double line graphs with the help of an example.
Ans.5 In competitive exams, double line charts represent the trend for two different categories. Based on the information given on the schedule, questions related to those categories will be asked. For example, if the schedule is for salary and savings, questions may be asked about spending, or about average income or average time saved, and so on. Check out the example in the article above. Line charts, also called line charts, are used to show the amount of data collected on a specific topic and over a specific time period. All data points are connected by a line. Data points represent observations collected in a survey or study. A line graph has an x-axis and a y-axis.
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Today’s world is more information oriented. Every part of our lives uses data in one form or another. Presenting data in tabular form is an ideal way to present it in a systematic manner. When these numbers are presented graphically in the form of bar or line graphs, they make a lasting impression on the mind of the observer, making them noticeable and understandable. Let us understand the line graph in detail in the following sections.
A line graph provides a graphical representation of changes over a period of time. The horizontal axis of a line graph is called the x-axis and the vertical axis is called the y-axis. The x-axis usually has the time you want to measure the quantity of a specific object or item on the y-axis. If the volume on the y-axis is increasing or decreasing over a period of time, a line chart can help you analyze the trend. A line chart gives a clear picture of an up or down trend.
A line chart is a type of chart or graph used to show information that changes over time. A line graph can be created using several points connected by straight lines.
The line chart shown above shows the bicycle company’s bicycle sales from January to June. Here, the x-axis represents the time period and the y-axis represents the number of bikes sold per month. The dark dot on the graph represents the data point. A data point on a line graph represents a number or number corresponding to a specific time on the x-axis. In the example shown, the number of bicycles sold in January is 50. Similarly, 30 bicycles were sold in February. We can interpret this data by data point for each month. A line segment connecting these individual data points indicates whether bicycle sales are trending upward or downward.
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A line graph consists of a horizontal x-axis and a vertical y-axis. Most line graphs only deal with positive numerical values, so these axes usually intersect near the bottom of the y-axis and the left end of the x-axis. The point of intersection of the axes is always (0, 0). Each bullet is labeled with a data type. For example, the x-axis can be days, weeks, quarters, or years, while the y-axis represents revenue in dollars. Data points are connected by a “point-to-point” line.
When comparing data sets, a line graph is useful only when the x and y axes follow the same scale. The X-axis is also known as the independent axis because its values do not depend on anything else. For example, time is always placed on the x-axis because it changes no matter what. The y-axis is also known as the dependent axis because its values depend on the variable on the x-axis: how much sales the company currently has. The
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