Tables and Graphing

Chapter 2 Section 3

Tables• Tables- these display

information in rows and columns so that it is easier to read and understand.

• Many of our labs we have done and will do contain tables for our information.

Lightsaber Color

How Many Jedi Use It

Blue 18

Green 15

Purple 1

Yellow 5

Red 4

Orange 2

Graphs• Graphs- these are used to collect organize,

and summarize data in a visual way.• There are three main graphs used in science– Bar Graph (We used this in the M&M lab)– Line Graph– Pie Graph

Bar Graphs• Bar Graphs- uses rectangular

blocks, or bars, of varying sizes to show the relationships among variables.

• The Dependent variable (the variable that is being measured) is on the y axis

• The Independent variable (the variable that changes) is on the x axis

Blue Green Purple Yellow Red Orange02468

101214161820

Lightsaber Color Use Bar Graph

Lightsaber color

Num

ber o

f Jed

i Tha

t Use

It

y

x

Line Graph• Line Graph- shows the relationship

between two variables.– Both variables in a line graph must be

numbers– Often line graphs are used to show something

happening over time.– The line shows the relationship between the

two variables on the graph

1974 1977 1980 1983 1986 1989 1991 1994 1997 2000 2003 2006 20090

1

2

3

4

5

6

7

Star Wars Movies vs. Time

Years (Every 3 years)

Num

ber o

f Sta

r War

s M

ovie

s

Pie Graph• AKA Circle Graph• Pie Graph-shows the parts of a whole.• It shows things in fractions and percentages.• Making a pie graph• A pie graph is a circle.• A circle is 360 Degrees.• So to find a portion of a pie graph you need to

find how much out of 360 Degrees your portion represents.

How to make a pie graph

• Remember percentages?• If there are a total of 45 Jedi and 15 of them

use a green Lightsaber then the percentage of Jedi with green Lightsabers is:

(15/45) * 100 = 33.3%• Take (15/45) * 360 = 120• 33% of 360 Degrees is 120 Degrees

Viewing Pie Graphs by Degrees

Sales

180 Degrees90 Degrees45 Degrees45 Degrees

SO….Pie Chart for our lightsaber table would be…

Lightsaber Color Use

BlueGreenPurpleYellowRedOrange