1. Graphing 101

2. What is Data?
• Information that is gathered
during an experiment
• Data is recorded in tables,
drawings, notes
Drawings
Notes

3. Graphing Rules
1. Title the Graph
2. Label X & Y axis
1. X-axis: independent variable
2. Y-axis: dependent variable
3. Use all the space on the graph
4. Make data points or bars
visible
5. Connect data points with a
line or curve on a line graph

4. Types of Graphs: Bar Graph
1. Use BAR GRAPH
when one variable is
non-numerical
(non-number)
Ex: Points scored by
three teams per year
(non-number)

5. Types of Graphs: Histograms
• Use
HISTOGRAMS to
plot physical
variables against
how often
(frequency) they
occur
• Looks similar to
bar graph
Exam Scores

6. Types of Graphs: Line Graph
• Use LINE GRAPHS
when one variable
(independent) affects
another variable
(dependent)
Relationship Between Picking Nose & Dates
PickingNose
# of Dates

7. Types of Graphs: Pie Graph
• Use PIE GRAPHS to
show proportions
Ex: Percentages of pie
preferences