1. GOAL FOR TODAY: Importance of Graphs.. How to make one.
Why do we need graphs?

3. Parts of a Graph Vocabulary: Independent variable:
Found on the X axis
The variable that is being tested (ex. New drug, fertilizer)
The “if” part of an “If-then” hypothesis
Found on horizontal line
Dependant variable:
Found on the Y axis
Variable that is measured at the end of an experiment, the results.
The “then” part of an “If-then” hypothesis.
Found on the vertical line
In summary:
"if x is given, then y occurs", where x represents the independent variables and y represents the dependent variables.

5. Graphs and Data Tables
1. Data tables are used to organize data which will be plotted in a graph.
MOST OF THE TIME….
First column in the table is for the independent variable.
Second column is another for the dependent variable.
Each column should be titled, and include units of measurement.
Data in the table must be arranged in ascending or descending order!!

6. Types of graphs: BAR GRAPH LINE GRAPH Bar, line, circle, pie
III. What type of graphs are these?:
1. ________________ 2._______________
BAR GRAPH
LINE GRAPH

7. More Graphs….What types are they?
Pie Graph
Histogram
_______________________
________________________

8. Creating a Line Graph: Step-by-Step
Creating a Line Graph: Step-by-Step **Fill in your paper with the RED writing
TITLE the graph__________________
Touch downs scored by NY Giants
Homeruns scored by Derek Jeter
VARIABLES – identify them! What are they? Where do they go on the graph?
Weight in KG – Y axes dependent variable
Months (jan, feb.) – X axes-independent variable
LABEL the axes ** Remember: Independent on X axes - horizontal line
dependent on Y axes – vertical line. (DON’T FORGET THE UNITS!!)
SCALE – Number the axes:
What is the largest number you need?
How many lines are available?
Can you skip lines to spread the graph out?

9. 5. PLOT the data points
6. CONNECT – draw a line between data points only!

10. PLOTTING A LINE GRAPH:
In order to plot a line graph, you’ll need the materials listed below:
Graph paper
Ruler
Pencil with an eraser (pens are NOT PERMITTED as mistakes are permanent!!

11. GUIDELINES:
Always use graph paper, as it is accurate (do not use notebook paper)
Draw all lines with a ruler.
Do not start on the edge of the paper.
Only use PENCIL as neatness always counts.
Use a whole piece of graph paper to do a graph. MINI graphs are hard to read!

13. What you need to create a graph:
-Title
-X axis
-Y axis
-Independent variable
-Dependent variable
-Units
-Data

14. Any Questions on Graphing ?????