changing at a constant rate. nearly equal in several trials. being compared to a control. observed at one point in time.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A line graph is best used when the measured variable is
Possibilities:
- changing at a constant rate.
- nearly equal in several trials.
- being compared to a control.
- observed at one point in time.

changing at a constant rate.