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What does the average rate of change of a function measure?
AOutput change over input change
BInput change over output change
CTotal output over total input
DTotal input over total output
Answer & Solution
Correct answer: A. Output change over input change
1. A rate of change compares how the output moves against how the input moves.
2. The average rate of change divides the change in output by the change in input.
3. Its units are always output units per input unit, such as dollars per year.
4. A falling output gives a negative average rate of change.
_Source: OpenStax College Algebra (CC BY 4.0), section 3.3 Rates of Change and Behavior of Graphs_