Collect and Analyze Data (GRAPHING)
What should be on every graph?
• THREE TITLES!• overall title at the top of your graph
describing what your graph is about• x-axis title (bottom line) describing
what information you test.• Y-axis title (vertical line) describing
what information you put
Title
Y-AXIS
X- AXIS
X-axis (horizontal, bottom line)
• Your INDEPENDENT VARIABLES go along your x-axis.• List each independent variable along the
bottom• Don’t forget to put a title along the x-axis
after you have listed your independent variables
Independent variable
Y-axis (vertical line)• Your DEPENDENT VARIABLE goes along
the vertical y-axis.• You must look at your data to come up with
an appropriate scale.• The scale is what you count up by along the
y-axis. • Example: count up by 1’s, count up by 2’s, count
up by 10’s, etc.
• Always start with zero in the bottom corner.
Dependent variable
What is a Variable????
Variables: are factors we can control, measure, or manipulate in an experiment
Types of Variables:
Independent Variable:*one we manipulate and can change
EX. Colors, Days, Months, Cities
Dependent Variable:*the one that we measure or observe
EX. Temperature, # of shark attacks
Control Variable:*the one that DOES not change
EX. Time we take temp, what tool we use, kind of flower pots
Independent Variable
DependentVariable
Possible Control Variables:*where you get data*when you take data
Bar graph & Line graph• You will make a bar graph if you are
comparing 2 or more things.• You will make a line graph if you are
tracking something changing over a period of time.
Practice bar graphFavorite Sport # of students
Basketball 45Football 36Baseball 18Softball 11Other 25
Basketball Football Baseball Softball Other05
101520253035404550
2014 Sports Particiaption
Practice Line graph
Year # of bears1995 302000 252005 172010 12
# of Bears Spotted in State Parks
1995 2000 2005 20100
5
10
15
20
25
30
35
# of bears
Years
Types of Graphs3 major types of Graphs:1. Bar Graph2. Line Graphs3. Circle Graphs
Bar Graphs 1. Categorical data 2. Vertical and horizontal bars3. Show amounts of each category
Line Graphs1. Most common in science*2. Shows change over time3. Shows how one variable
changes in response to another
4. Shows trends of data
Circle Graphs1. Categorical data2. Shows relationship of part
to the whole3. Must have data for all
categories4. Also called a pie chart