The independent variable is what the experimenters change. The dependent variable is what they measure in response. On a graph, independent is usually the x-axis and dependent is the y-axis. Experimental design as a whole is in experimental design.
What was set, what was read
Temperature the team chose is independent. Growth they recorded is dependent. If they run the same setup without the treatment, that is a control, in the control group.
Axis labels tell you the same story in one glance, in axis labels and units. Direct versus inverse then describes how those two variables move, in direct versus inverse.
The bottom line
Changed on purpose: independent. Measured as a result: dependent. Read the axes before you name either one.
Start practicing
Start with a free diagnostic, then drill your weak spots with 15-question quizzes and track how you're doing across Reading, English, and Math. Compare plans whenever you're ready to go further.
This article offers general ACT prep guidance. The ACT can change from year to year, including its format, scoring, policies, test dates, and fees, so always confirm the latest details on the official ACT website at act.org before you make decisions. ACT® is a registered trademark of ACT, Inc. thirty-six is not affiliated with, endorsed by, or sponsored by ACT.