Year 10 Economics lesson in ppt.

1. USES OF TABLES &
CHARTS
Teacher: Ibironke Sonuga

2.  Define Tables
 Enumerate the characteristics of a good table
 Explain the importance of tables
 Construct a pie chart from a given data
 Construct a simple, component and multiple bar
chart from a given data
 Construct a line graph from a given data
 Choose an appropriate chart to use for different data
Lesson objectives
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3.  Tables and charts, are frequently used
to visually communicate data
 The goal in creating tables, charts or
graphs is to present data in a clear and
accurate format which is easily
interpreted.
Introduction
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4.  A table is an orderly presentation of
data using rows and columns.
Tables
Names Class Age hobbies
Shade 7 10 Reading
Femi 8 12 Swimming
Obi 7 11 Writing
Sule 7 10 Swimming
Ada 9 12 Reading
Gomwok 8 11 swimming
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5.  It must have a title
 The sub-heading of the columns and rows must be stated
 The units of measurement used in the table must be
stated
 The source of information should be stated
 Number your tables
 It must be easy to understand. Organize your tables
neatly so that the meaning of the table is obvious at first
glance
Characteristics of Good Tables
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6.  It explains more information in less time than
pages of an explanatory essay
 Makes comparison easier
 Highlights the important information
 Easier and faster decision making
Importance of Good Tables
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7.  A diagram that shows functional relationship
between two variables
 Graphs are used in economics and statistics for
analysis. Examples are:
 Pictogram
 Pie charts
 Bar chart: single bar chart, multiple bar chart,
component bar chart.
 Histogram
 Line graph
Graphs
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8. These are charts in which
pictures or drawing of
objects are used to represent
data
Pictogram
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9. Pictogram
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10.  This is a circle divided into sectors, each sector
representing the relative size of different variables of
the population or objects
Pie Chart
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11.  How to construct a pie chart:
 Add up total figures
 Calculate the angle of each sector
 Draw a circle of convenient size
 Divide the circle into sectors using the angles
calculated above
 Write the degree of each sector in in it.
 Don’t forget your title
Pie Chart
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12.  This is a representation of data by scaled
lengths of bars. These bars are equal in
width, and the lengths are proportional to
the quantities they represent. The body of
the bars must not touch each other.
 There are:
Bar Chart
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13.  Simple Bar Charts – One variable in. The bars
are of equal widths and lengths proportional
to the values they represent in the data
Bar Chart
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14. Component Bar Charts – each bar is divided
into two or more sections, proportional in size
to the component parts of a total being
displayed by each bar
Bar Chart
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15.  Multiple Bar Charts – component values are
drawn as different bars adjoining each other.
Bar Chart
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16.  The histogram is similar to the simple bar chart but the bars
are connected together. There are no spaces between
them.
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Histogram

17. Line Graph
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 The line graphs make use
of lines for data
representation.
 The line graphs are very
useful in economics.
 Examples are the demand
and supply curve, costs
curve, etc.
s
s
P
Q

18.  Define Tables
 Enumerate the characteristics of a good table
 Explain the importance of tables
 Construct a pie chart from a given data
 Construct a simple, component and multiple bar
chart from a given data
 Construct a line graph from a given data
 Choose an appropriate chart to use for different data
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Can you now….