Bar Graph Chapter Notes | Mental Maths - Class 1 PDF Download

What is a Bar Graph?

• The bar graph helps to compare the different sets of data among different groups easily.
• It shows the relationship using two axes, in which the categories are on one axis and the discrete values are on the other axis.
• The graph shows the major changes in data over time.

What Constitutes a Bar Graph?

Following are the many parts of a bar graph:

• Vertical axis
• Horizontal axis
• The bar graph’s title informs the reader of its purpose.
• The title of the horizontal axis indicates the information that is shown there.
• The title of the vertical axis indicates the data it is used to display.
• The categories on the particular axis indicate what each bar represents.
• The bar graph’s scale demonstrates how numbers are used in the data. It is a system of markings spaced at specific intervals that aid in object measurement. For instance, the scale of a graph may be stated as 1 unit = 10 fruits

Types of Bar Graphs

1. Vertical bar chart
2. Horizontal bar chart
   

Vertical Bar Graphs

When the grouped data are represented vertically in a graph or chart with the help of bars, where the bars denote the measure of data, such graphs are called vertical bar graphs. The data is represented along the y-axis of the graph, and the height of the bars shows the values.

Horizontal Bar Graphs

When the grouped data are represented horizontally in a chart with the help of bars, then such graphs are called horizontal bar graphs, where the bars show the measure of data. The data is depicted here along the x-axis of the graph, and the length of the bars denote the values.Horizontal Bar Graph

Properties of Bar Graph

Some of the important properties of a bar graph are as follows:

Applications of Bar Graphs

1. In a restaurant, a bar graph can show which foods are popular. Each bar's height tells us how many orders were made for that food.
2. In elections, bar graphs show how many people voted for each person. They also show how much money different parts spent. Bars are stacked to compare them easily.

Advantages and Disadvantages of Bar Chart

Let's make a bar graph for different pets like cats, dogs, rabbits, and hamsters, and how many there are of each.

Step 1: Decide on the title, like "Pets at Home".

Step 2: Draw lines up and down and side to side.

Step 3: Put labels on the bottom line.

Step 4: Write "Cat", "Dog", "Rabbit", and "Hamster" on the bottom line.

Step 5: Label the side line with "Number of Pets".

Step 6: Pick how many pets each square means.

Step 7: Finally, draw bars for each type of pet with how many there are.

Double Bar Graphs

Introduction:

Double bar graphs are like superhero tools for comparing two things at once. Imagine you have marks from two tests for five students. A double bar graph helps us see, at a glance, which week the students did better.

Key Points:

• Double bar graphs compare two quantities for the same observation.
• They are great for analyzing and comparing data effectively.