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Show numerical data in physical form
- Its purpose is to show numerical data in physical form so that it can be understood quickly, easily and clearly.
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Jan 24, 2024 · The purpose of the graph is to show numerical facts in visual form for their better and quick understanding. It is specially very useful when there is a trend or comparison to be shown. A Bar Graph
This chapter is all about graphs. In this chapter, we will. See Different Types of Graphs like Bar Graph, Double Bar Graph, Pie Chart, Histograms. Learn what a line graph is, and how to read it. Draw a line graph. Learn what a linear graph is. What is a point, and what are x and y coordinates of the point.
- What Are The Different Types of Graphical Representation of Data?
- Bar Graphs
- Pie Charts
- Histograms
- Linear Graphs and Application
- Line Graphs and Linear Graphs
Graphical methods used to present data are very efficient in organizing the data and understanding them. There are various graphical methods which are mentioned below: 1. While comparing among categories, the method which is appropriate is the bar graph. 2. While comparing parts of a whole, a pie chart is the ideal method. 3. When data is provided ...
Bar Graph
A bar graph is used to show comparison among two or more different categories. Parallel vertical bars(rectangular in shape) are used to represent the data on a bar graph. For example: The graph here represents a student’s marks in maths in the first, second and third terms respectively.
Pie Charts
A pie graph is used to represent the parts of a whole. A circle is used to represent the whole. The pie graph below is used to represent people’s choice of television channels. The circle as a whole here is represented by all the people who took part in the survey. Since it is a whole, the sum of all percentages represented in a pie graph must add up to 100%. To know more about Pie Chart, visit here.
Histogram
A histogram is nothing but a bar graph, that is used to group numbers into ranges. It shows data in intervals like the case of the table below. The x−axis of the graph is labelled from 40-65, as Weights (in kg), in intervals of 5. The y−axis is labelled as No. of persons. A histogram is used to represent continuous data. In the graph above, it presents the data available for all values between 40 and 65.
Linear Graph
A graph where all the data points can be plotted on a single straight line is called a linear graph. For any two variables, the relation can be drawn by constructing the table of values if the rule for that relation is mentioned. At least two points coordinates should be known to plot a straight line graph. These points must fit the rule. For example, take the points W(2,6), X(3,5), Y(5,3) and Z(6,2). Upon plotting the points on the graph, we see that all of them can be connected by a straigh...
Application of Graphs
Depending on how the values of a variable change with respect to another, we have two types : independent and dependentvariable. Independent (or control) variable is one where it’s value doesn’t changewith respect to another quantity. Dependent variable is one where the value does changewith respect to another quantity. For example, consider quantity of electricity consumed and the electricity bill. The quantity of electricity consumed doesn’t depend on any other quantity, hence it is an inde...
Line Graph
A line graph is one that is used to plot data that changes over a period of time. Consider a table of the kind as shown here : Here as observed, the temperatures constantly varies over a period of time. So a line-graph can be used to chart the increase and decrease of temperature over the course of 12 hours from 6AM to 6PM. Time is on the x-axis and temperature will be on the y-axis. To know more about Line Graph, visit here.
Cartesian Plane and Coordinate Axes
A cartesian plane is formed and defined by two perpendicular number lines : the x−axis, which is horizontal and the y−axis, which is vertical. These are called the coordinate axes. The point at which the two axes meet is called the zero or originof the cartesian plane. The two coordinate axes help to plot any point on the cartesian plane. To know more about Cartesian Plane, visit here.
Representation of Point on the Plane
Ploting a point on the plane. An ordered pair of numbers are used to represent any given point on a cartesian plane. They are written in the form (x,y), where the value of x represents the x-coordinate of the point and the value of yrepresents the y-coordinate of the point. In simple terms, the x and y coordinates explain how far from the origin the point is with respect to the x−axis and y−axis respectively. For example, consider a point (3,4). Here 3 is the x-coordinate while 4 is the y-coo...
Introduction to Graphs In Revision Notes Class 8 Maths Chapter 13. Graphs are basically the visual illustrations of the data gathered. Graphical representation enables us to showcase the trend of the data. These graphs are applicable in different fields and it is of great help to the people.
- Ans: Revision Notes play a vital role in preparation for the final exam. Every student must have a copy of revision notes before they appear for th...
- Ans: The Class 8 Revision Notes Chapter 13 PDF is accessible free of cost. Students can easily download this PDF and fetch maximum benefits from it...
- Ans: Along with conceptual knowledge students need lots of practice by solving a large number of problems to score good marks in CBSE Class 8 Maths...
Class 8 Mathematics Notes of Introduction to Graphs. When the data is presented in a graphical format, it is easier to understand: A bar graph is employed to show comparisons between categories. A pie graph is employed to compare portions of a whole. A bar graph where data is displayed in intervals is called a histogram.
Revision Notes on Introduction to Graphs. Graph. The graphs are the visual representation of the data collected in numerical form so that it could be easily understood. Graphs are generally used for comparisons between two or more data. Types of Graph. 1. Bar Graph.
In math, a graph can be defined as a pictorial representation or a diagram that represents data or values in an organized manner. The points on the graph often represent the relationship between two or more things.
