graphs are pictures of information graphs provide a fast and easy way to interpret data why use...
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Graphs are pictures of information
Graphs provide a fast and easy way to interpret data
Why use Graphs?
Choosing the Right GraphIt’s important to choose the type of graph that best illustrates your data:
Bar Graph Pie Graph Line Graph
Best used for comparing data quickly and easily
Best used for Showing
percentages(Parts of a Whole)
Best used for looking at
changes overtime (Trends)
Which type of graph would you use for the following data?
Food Percentage Preferring That Food
Skippy’s Rabbit Chow 32
Homemade Rabbit Food 13
Happy Rabbit 10
Joes Special Food for Rabbits 44
Premium Rabbit Nutrition Diet 1
Rabbit Dietary Preferences
Type: Pie Graph.Why: Because there are percentages or parts of a whole.
Which type of graph would you use for the following data?
Month Grade
September 98
October 94
November 88
December 78
January 82
February 83
March 86
April 81
Monthly Science Grades 2010-2011
Type: Line Graph.Why: Because there is a change over time.
Which type of graph would you use for the following data?
Test Tube Number pH
1 6.7
2 7.1
3 7.4
4 7.1
5 7.0
6 6.9
pH of Solutions – Unit 5 Chemistry Experiment
Type: Bar Graph.Why: Because data is being compared.
Components of a Good Graph
Graphs require the correct ingredients, or components, to make them readable and understandable.
For bar graphs and lines graphs, first set up your x-axis and y-axis using a ruler.
The x-axis is horizontal
The y-axis is vertical
x-axis
y-a
xis
The Dependent Variable is the data collected during the experiment. It Responds to the change in the independent variable. This is placed on the Y-axis.
The thing that is Manipulated by the experimenter, the Independent Variable, is placed on the X-axis.
MIX
DR
Y
Components of a Good Graph
Next choose a scale for each of the axes.• Select evenly spaced intervals that include all of
your data.• Always label your axis and include appropriate
units where they apply.P
rofi
t (i
n U
S D
oll
ars)
Month
2010 4th Quarter Profits
Components of a Good Graph
Include a legend when necessary to further clarify your data.
LegendTexas
CaliforniaNevada
Components of a Good Graph
Finally, give your graph a TitleA title tells the reader what he or she is studying.A good title should explain the relationship
between variables.
Components of a Good Graph
Texas
CaliforniaNevada
Pie graphs are shaped like a circle.The size of each “slice” is determined by the
percentage it will represent.On the a pie graph, the independent variable is
whatever the slice of the pie represents, and the dependent variable is the size of the pie slice, the percentage of the whole it represents.
Components of a Good Graph