1. Independent: Days of the month Dependent: Hormone Level

2. Independent: ethylene glycol dependent: days to mature

3. Independent: Age of trees Dependent: thickness of rings

4. Independent: Ethylene Dependent: days to mature

5. Variables—if you measure something, its more than likely a line graph
Independent—
-it happens with or without you
-you don’t measure it, you use it to compare changes
-it’s the environment
Dependent—
-you are measuring it
-it changes because of the environment
-under different conditions, the results of an experiment could be very different
This is an experiment, not an observation!

6. Bar Graphs-you may have counted something to determine a trend
You counted, you didn’t measure
There is no independent variable because you didn’t measure anything
Often, you can include multiple sets of information in the same graph so that you can compare different subjects
Most often, the data is mathematically altered (% or average)

7. Pie Graphs-compares within a group in the same “location”
You measure nothing, you usually count and convert the data
Pies are based on 100%, so most of the time it’s a % calculation
Think of the data a part of a whole
Usually, only one set of data (unlike multiple bars or lines)