1. Graphing (Just the basics...)

2. Graphs What are Graphs? Why do scientists use them?
What other professional use graphs?
Why in the world would anyone WANT TO use graphs?

3. 3 Types

4. Line Graphs
The type most used on the Regents (99% of the time!) is a LINE GRAPH!

5. Rules for Line Graphs Give your graph a Title Label BOTH axes (X & Y)
What are you graphing?
Label BOTH axes (X & Y)
Which one is the X axis?
Which one is the Y axis?
Label Appropriate Scale (Spaced EVENLY)
Use a key if plotting more than one source of data

6. Steps to follow USE A PENCIL! Label the horizontal and vertical axes
Independent Variable on the horizontal (HIV)
Dependent Variable on the vertical
Do NOT forget the units!
Number the horizontal and vertical axes
What is the largest number you need for your data?
How many lines are available? (Count ‘em!)
Can you skip any lines to spread the graph out?
Plot the data points (use small dots, NOT BASEBALLS!)
Connect the data points if told to do so
Title the Graph

7. Variables Independent Variable (HIV) Dependent Variable (DVV)
This is what the experimenter CHANGES in the experiment
Sometimes called the Manipulated Variable
Goes on the X-axis! (Horizontal)
Dependent Variable (DVV)
The variable that is measured
Goes on the Y-axis! (Vertical)

8. Let's try it....
Plot the following information on the graph and answer the questions...
What should the title be?
What are the two variables?
What is the unit for time?
What is the unit for temperature?
Time
(Days) 1 2 3 4 5 6 7
Temp
(Celcius) 12 16 21 18 20 22 19

10. Let's try it....again!
Plot the following information on the graph and answer the questions...
What is the unit for rainfall?
Create a key!
Time
(Days) 1 2 3 4 5 6 7
Temp
(Celsius) 10 14 18 17 15
Rainfall
(cm)
3.5
0.5
1.5