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# RS Aggarwal Class 8 Mathematics Solutions for Chapter-23 Line Graphs and Linear Graphs

Last updated date: 16th Jul 2024
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Vedantu provides the solutions of RS Aggarwal Class 8 Maths Chapter 23. The topic of Chapter 23 of Mathematics is Line Graph and Linear Graphs. The Chapter Line graph and Linear graph in Class 8 Maths RS Aggarwal mainly deals with the topic of drawing graphs and framing equations correctly by understanding the concepts of Linear graphs. The Solutions provided by Vedantu are very easily plausible. The stepwise solutions of every sum of the chapter give the student a clearer depiction of the entire chapter. You can download the PDF of the solutions of Chapter 23 for free from Vedantu. Vedantu is a platform that provides free NCERT Solution and other study materials for students. Science Students who are looking for NCERT Solutions for Class 8 Science will also find the Solutions curated by our Master Teachers really Helpful.

## RS Aggarwal Solutions Class 8 Chapter 23

### What is a Line Graph?

It is a type of graph that displays the continuous data that is changing over some time. It is made by joining the series of data points using a line segment consecutively.

### What is a Linear Graph?

It is a straight line graph drawn on a plane that connects points on the x and y-axis. A linear graph represents the linear relationship between two variables.

Line graphs are of three types:

• Single Line graph

• Double line graph

• Compound line graph

### Steps to Construct a Line Graph

• On a graph draw two lines parallel to each other. The x-axis is the horizontal line and the y-axis is the vertical line.

• Choose an appropriate scale along the x-axis.

• Make the points.

• Join each point with the consecutive point using a ruler. Thus, a line graph is obtained.

• Example of a line graph:

### How to Interpret a Line Graph?

You can interpret line graphs by studying the data and analysing it. Interpreting the line graph data is:

• Making sense of the given data.

• Answering queries using the given data.

• Making predictions based on the trends.

• Finding the value of one variable given the value of the other and so on.

For Example:

Question: The line graph given below shows the yearly sales figures for a manufacturing company during the last five years.

Question. Study the graph given above and answer the following questions given below:

(i) Compute the sales in,

(a) 2013

(b) 2015

(c) 2016?

(ii) Compute the reduction between sales in 2012 and 2016?

(iii) Find out the year in which there was the greatest difference between the sales as compared to the previous year?

Solution:

(i) The sales in

(a) 2013 was Rs 7 cr.

(b) 2015 was Rs10 cr.

(c) 2016 was Rs 8 cr.

(ii) after computing the reduction between sales in 2012 and 2016 is Rs 4 cr.

(iii) The greatest difference was in 2015.

### Single Line Graphs

A graph used to show changes over time is called a Line graph. A line graph consisting of a single line is known as a single line graph. The single line graph is used to represent only a single data set.

Example of a single line graph:

### Double Line Graphs

A line graph with two lines connecting points to show a continuous change is called a Double line graph. As shown before in a line graph, the lines can ascend and descend in a double line graph.

A double line graph has two axes. In the graph, the occurrences and categories being compared over time are represented by the x-axis, and the scale is represented by the y-axis. A set of numbers representing the data which is organised into equal intervals is called a scale.

Example of Double line graph:

### What is a Cartesian Plane?

• A plane in which two perpendicular axes intersect each other is known as the cartesian plane.

• The x-axis and the y-axes are the horizontal axes and the vertical axis respectively.

• The point at which both the axes intersect is known as the origin and is denoted by O.

• Both the axis, that is, the x-axis and the y-axis are known as the coordinate axis.

• The x-coordinate is located at a given distance from the y-axis and the y-coordinate is located at a given distance from the x-axis at a point denoted by P.

• The abscissa and the ordinates are the names given to the x-coordinate and the y-coordinate respectively.

### Introduction to Linear Graph

It is a collection of points that can form a straight line. The graph (straight line) that is formed while representing the relationship between the x-axis and the y-axis is called a linear graph.

For fixing a point on the graph sheet you need, x-coordinate and y-coordinate.

### Class 8 Maths Chapter 23 - Line Graphs and Linear Graphs: At A Glance

• The two coordinates, that is, abscissa and ordinates represent data pictorially in the cartesian plane.

• The graphs show the relation between two types of quantities or objects.

• Graphs are of various types such as line graph, linear graph, bar graph, pie chart, and histogram.

• The two types of graphs described in this chapter are line graphs and linear graphs.

• If you represent the data on the x-y plane in the form of straight unbroken lines, it is known as a linear graph.

• When the data is represented on the x-y plane in the form of straight lines or curves, it is known as a line graph.

• Independent variables are the ones whose value does not change with respect to the value of another quantity. Independent variables are also known as control variables.

• Dependent variables are those variables whose value changes with respect to another quantity.

### Uses of Line Graphs:

• In order to track changes over a short and long period of time, line graphs are used.

• In order to compare the changes for different groups over the same period of time,  line graphs are used.

• It is the best graph to represent data whenever small changes in data exist.

### Examples of line graphs:

Some real-life examples of line graphs are:

• Line graphs help in describing future contract markets and opportunities.

• Line graphs are also constructed by the pharmaceutical sector to determine the accurate strength of drugs.

• Line graphs are also used by the government for the preparation of the budget.

• Line graphs are also used to estimate if an individual's body weight is according to their height.

### Preparation Tips

• First, go through the chapter thoroughly and cover all the topics.

• Note down all the important formulae and try to learn them.

• Start solving the exercise questions without any guidance from anyone.

• Try the questions at least 3 times if you are unable to solve them.

• Seek help from Vedantu’s solution to check your answers and solve the ones that you were unable to solve.

## FAQs on RS Aggarwal Class 8 Mathematics Solutions for Chapter-23 Line Graphs and Linear Graphs

1. Why Should I Study RS Aggarwal Solutions Maths Class 8 Chapter 23 ( Line Graph and Linear Graph) from Vedantu? Should I Trust them?

The study material of Line graph and Linear graph by Vedantu has covered all the topics that could be asked in an examination. The stepwise explanation for every problem helps the students to clarify their major doubts. Start studying Vedantu's study material, it is the perfect choice for you.

The study material and the solutions are prepared as per the CBSE guidelines. The solutions are prepared by the top educators who have gained expertise in this field over the years. Vedantu gives its students the utmost priority and helps them in all possible ways to achieve their goals. Vedantu is one of the most reliable online coaching institutes in India.

2. How will Vedantu Help me to Solve the Questions of RS Aggarwal Solutions Class 8 Chapter 23 (Line Graph and Linear Graph)?

At Vedantu, we have a team of subject experts that are experienced and also the best in their field of study. The faculties have been in this field for many years and very well know the exam pattern of CBSE. They also know the kind of questions asked. The RS Aggarwal solutions have been designed by such subject experts only. With experience, the experts know exactly what kind of doubts may arise in a student's mind and therefore such doubts are already cleared in the solutions PDF file. Also, the solutions have been explained in such an easy manner that it will help students in easily understanding the concepts and retaining them in their minds for a long time.

3. How can I get the RS Aggarwal solutions Class 8 Chapter 23?

The mathematics solutions of RS Aggarwal of Class 8 Chapter 23, that is line graph and linear graph can be downloaded from the official website of vedantu. The PDF file of RS Aggarwal is absolutely free of cost. The students will have to register on the official website by using their email addresses. Once they have registered, the students will have access to all available study material for all subjects which can be easily downloaded from the website in the form of a PDF file.

4. What are the benefits of studying RS Aggarwal Solution for Class 8 Chapter 23, line graphs, and linear graphs?

Students can greatly benefit from the RS Aggarwal solutions for Chapter 23 of mathematics, that is, line graphs and linear graphs for Class 8. The benefits to the students are:

• The solutions can be easily assessed from the website.

• The solutions prepared by the Vedantu team of experts are in accordance with the latest CBSE guidelines for Class 8 maths exams and are completely accurate to the best of their knowledge.

• The solutions given by the experts should be used by students to not only study for their exams but also complete their day-to-day homework.

5. What type of questions are available in RS Aggarwal Class 8 maths solutions for Chapter 23, line graphs, and linear graphs?

The RS Aggarwal Chapter 23 of Class 8 maths contains a diverse range of questions including diagram-based questions, subjective questions, and objective questions. The first 5 questions of RS Aggarwal Maths of Class 8 are diagrams based wherein the students will be required to draw line graphs for a given set of data in each question. Some questions are also designed on the construction of double line graphs which will help students in the comparative study. The other questions included helping students in interpreting problems and reading line graphs and double line graphs.