Definition: 0.5 Mark each
a) Bar graph: A bar graph is the simplest form of presenting data. It consists of bars all of the same width. The heights of these bars are drawn according to the value they represent.
b) Pie graph: When the given data is represented by the sectors of a circle, the resulting graph is called a pie graph or a pie chart
c) Line graph: A line graph is obtained when the given values are marked by points and then these points are joined by line segments.
d) Linear graph: A line graph consists of bits of line segments joined consecutively. If the graph is a whole unbroken line, then it is known as linear graph.