What you’ll learn
Identify dependent and independent variables.
Key idea
The dependent output is computed from that chosen input; equation position does not assign roles.
Roles follow the stated setup where count is chosen and cost computed; neither units nor alphabetic/equation position determines independence.
Worked example
Classify examples and non-examples for the concept 'Identify dependent and independent variables'.
A buyer chooses n=6 notebooks priced at $3 each; total cost is C=3n. Classify the claim 'C is independent and n dependent' in this purchase setup.
- The buyer chooses the notebook count n; each notebook costs $3.
- C=3n determines total cost; choosing n=6 or 7 gives C=18 or 21.
Answer: Non-example — n is the chosen input and C is computed by the pricing rule.
Quick Check
Classify examples and non-examples for the concept 'Identify dependent and independent variables'.
A buyer chooses n=9 notebooks priced at $5 each; total cost is C=5n. Classify the claim 'n is independent and C dependent' in this purchase setup.