1. Variables Data Processing Graphs
Unit 1 Lecture 3
Variables
Data Processing
Graphs

2. Variables

3. Sample Problems
Research questions are listed below. For each question identify the independent variable, dependent variable and constants.
How much water flows through a faucet at different openings?
Does heating a cup of water allow it to dissolve more sugar?
Does fertilizer make a plant grow bigger?
Does an electric motor turn faster if you increase the voltage?

4. Data Processing Review your data and ask yourself these questions
Is it complete or did I forget something?
Do I need to collect more data?
Did I make any mistakes in collecting the data?
Is there a pattern to my data?
Did I perform multiple trials?

5. Data Processing
For multiple trials average the data you collected to obtain a mean
Mean = (Trial 1 + Trial 2 + Trial )
Number of trials
Example:
In an experiment you recorded the following data:
trial 1 = 10cm; trial 2 = 15cm; trial 3 = 30 cm; trial 4 = 20cm; trial 5 = 25cm
Calculate the mean for this experiment

6. Graphs All graphs should have A title Axis labels Units
Appropriate scaling
A legend

7. Types of graphs

8. Graph Checklist