On a graph showing temperature (T) over time (t), the ______...

Question Analysis
This question links variable roles to graphing conventions. The focus is on understanding that the dependent variable is always plotted on the y-axis.

Key Concept Explanation
Independent variable (time t): Always on the horizontal (x-) axis.
Dependent variable (temperature T): Always on the vertical (y-) axis.

Step-by-step Solution
The scenario describes temperature (T) changing over time (t).