NCERT Solutions for Class 8 Maths Chapter 15 Introduction to Graphs

In the chapter named Introduction to Graphs, students learn to represent various sorts of information with different sorts of graphs. The various sorts of graphs are as follows: bar graphs, pie graphs, line graphs and linear graphs. This chapter will help the students in learning how to locate a point and coordinate in a chart. A sum of 3 exercises is available in the chapter to help the students understand the concepts of Graphs.

Introduction to Graphs
Graphs are a visual representation of data collected. Its purpose is to show numerical data in physical form to be understood quickly, easily and clearly.

Bar Graph
A bar graph is commonly used to show a comparison of two or more different categories. Parallel vertical bars are used to represent the data on a bar graph.

Pie Charts
A pie-graph or pie chart is used to represent the parts of a whole. A circle is used to represent the whole

Histogram
A histogram is just a bar graph, which is used to group numbers into ranges. It shows data in intervals.

Linear Graph
It is a graph where all the data points can be plotted on a single straight line

Application of Graphs
Conditional on how the values of a variable change for another, we have two independent and dependent variables.

• Independent (or control) Variable is the one, where its value doesn't change for another quantity.
• Dependent Variable is the one, where the value does change for another quantity.

Line Graph
A line graph is used to plot data that changes over a certain period of time.

Cartesian Plane and Coordinate Axes
Coordinate axes are formed and defined by two perpendicular number lines: the x−axis, which is horizontal and the y−axis, which is vertical.

Key Features of Aakash's NCERT Solutions

• It gives a clear definition of graphs in a no-complex language
• This is a very scoring chapter if understood properly by the students.
• Aakash Solution presents it in a distinctive way to learn the problems step-by-step.