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Question: Explain the reading and interpretation of bar graphs....

Explain the reading and interpretation of bar graphs.

Explanation

Solution

In order to solve this question the first step in reading a bar graph is to know what it represents. For this, we read the caption which is generally written at the bottom of the horizontal line x-axis and adjacent to the vertical line y-axis.
After this, we understand the scale of the graph in order to know the precise value of the given data.

Complete step by step Solution:
For solving this question we will learn first what are bar graphs:
A bar chart or bar graph is a chart or graph that presents categorical data with rectangular bars with heights or lengths proportional to the values that they represent. The bars can be plotted vertically or horizontally. A vertical bar chart is sometimes called a column chart.
Now we will know for what these are used:
A Bar Graph. Bar graphs are used to compare things between different groups or to track changes over time. However, when trying to measure change over time, bar graphs are best when the changes are larger.
Now coming to the question:
Reading and interpretation of Bar graph:
The first step in reading a bar graph is to know what it represents. For this, we read the caption which is generally written at the bottom of the horizontal line x-axis and adjacent to the vertical line y-axis.
After this, we understand the scale of the graph in order to know the precise value of the given data.
After reading the bar graph, one must draw conclusions from it. Drawing various conclusions from a given bar graph is referred to as the interpretation of the bar graph.

Note:
The most usable graphs are line graphs and bar graphs.
As we already learned the bar graph so here we will learn line graphs:
A line graph is a type of chart used to show information that changes over time. We plot line graphs using several points connected by straight lines. We also call it a line chart. The line graph comprises two axes known as the ‘x’ axis and ‘y’ axis.
The horizontal axis is known as the x-axis.
The vertical axis is known as the y-axis.