Independent: Days of the month Dependent: Hormone Level

Independent: ethylene glycol dependent: days to mature

Independent: Age of trees Dependent: thickness of rings

Independent: Ethylene Dependent: days to mature

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!

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)

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)