Which is the independent variable? The times to take samples were determined by the investigator. Time is the independent variable.
Which is the dependent variable? The height of a seedling depended on the time it was sampled. Height is the measured quantity, making it the dependent variable
Weekly height measurements for seedlings of Acer palmatum:
The investigator is interested in presenting the relationship between seedling height and time. Should these data be plotted on a graph?
If you do plot these data, which variable will you plot on the y (vertical) axis?
Independent variable (time)
Dependent variable (height)
NOTE: The data table will be reproduced at the bottoms of the pages that follow