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Proper GraphingProper GraphingHow to do it right!How to do it right!



Bar Graphs• It is important that all graphs followcertain rules. These rules allow

anyone to look at a graph and getinformation from it.



at in ormation iscontained in the graph

below?



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



at in ormation iscontained in the following

graph?Voters in the 2006

Election



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



What new information can

we find out?Voters in the 2006

Election

ETHNIC GROUPS

NUMBER

OF

PEOPLE



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



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



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



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



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?



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



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



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



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