Embedded Files
TYPES OF GRAPHS
TYPES OF GRAPHS
bar graph
bar graph
Uses rectangular bars to compare numeric values across different categories.
line graph
line graph
Shows how data changes over a specific period of time.
pie chart
pie chart
Displays data as slices of a circle to show the proportion of a whole.
histogram graph
histogram graph
A type of bar graph that shows the frequency distribution of numerical data.
picture graph
picture graph
Uses pictures or symbols to represent data.
scatter plot
scatter plot
Uses dots to represent the values obtained for two different variables.
what is a frequency polygon?
what is a frequency polygon?
A frequency polygon is a line graph used to show a frequency distribution for grouped data. It is constructed by plotting points at the midpoints of each class interval against their corresponding frequencies and connecting these points with straight line segments. The x-axis represents the class midpoints, and the y-axis represents the frequency, providing a visual representation of the data's shape, trend, and distribution.
To draw frequency polygons, first we need to draw histogram and then follow the below steps:
Step 1- Choose the class interval and mark the values on the horizontal axes
Step 2- Mark the mid value of each interval on the horizontal axes.
Step 3- Mark the frequency of the class on the vertical axes.
Step 4- Corresponding to the frequency of each class interval, mark a point at the height in the middle of the class interval
Step 5- Connect these points using the line segment.
Step 6- The obtained representation is a frequency polygon.
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