Proper Graphing
Transcript of Proper Graphing
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Proper GraphingProper GraphingHow to do it right!How to do it right!
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Bar Graphs• It is important that all graphs followcertain rules. These rules allow
anyone to look at a graph and getinformation from it.
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at in ormation iscontained in the graph
below?
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Why We Need Titles• The title tells us the generalinformation that the graph contains.
• The title does not need to be verydetailed, but it must relate to thegraph
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at in ormation iscontained in the following
graph?Voters in the 2006
Election
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Axis Labels????• Even though the graph title gives ussome information, we still do not have
a good idea of what EXACTLY we arelooking at• Labeling the x and y axes allows us to
know what information is containedon which part of the graph
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What new information can
we find out?Voters in the 2006
Election
ETHNIC GROUPS
NUMBER
OF
PEOPLE
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Scales – and I don’t meanweight!
A scale is a set of values that run along the y(up and down) axis of a graph.They are normally numbers of some sortScales are important because they let usknow if we are dealing with 10’s or 100’s of numbers
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Where is the scale on this
graph?Voters in the
2006 Election
ETHNIC GROUPS
NUMBER
OF
PEOPLE 0
100
200
300
400
500
600
700
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X-Axis Units• In addition to the scale on the y-axis, you must also have units on the x-
axis• These units can be numbers, or
categories
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Summarize the informationcontained in this graph:
Voters in the
2006 Election
ETHNIC GROUPS
NUMBE
R
OF
PEOPL
E
0
100
200
300
400
500
600
700
Caucasian Spanish Chinese Malaysian
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Graph Questions• How many people voted in the election?• Which ethnic group had the most voters?
• Which ethnic group had the least voters?• What year did the election take place?
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Graphing Rules• Use a ruler to make all lines straightand neat
• Graphs should take up at least half apage
• Title must be underlined
• Columns must be different colours
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THE PROPER WAY TO CREATE AGRAPH!!
Underlined Title
X Axis Label (with units if needed)
A X I S L A B E L W /
U N I T
0
100
200
300
400
500
600
700
Label for each bar
Label for each bar
Label for each bar
Label for each bar
C O L O U R E D
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Now, Create Your Own• Use the followingdata to create agraph. Use thegraph format youhave copied downfrom the previous
slide4Participated fully11Participated well
7Three or more usefulcontributions
2One usefulcontribution
0No useful
contributions
Number of students 24
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Make another graph from
this information
1Made an excellent contribution to writtenwork
13Very good did what was required and wellpresented it well
4Good contribution to written work
5Made a small contribution to written work
1Did no written work or drawing