Advanced MathEasy–MediumRecognising a linear versus exponential situation
Advanced Math practice question
A savings account adds $50 to its balance every month with no interest. Which type of function models the balance over time?
- A. An increasing linear functionCorrect
- B. An increasing exponential function
- C. A decreasing linear function
- D. A quadratic function
Answer: A. An increasing linear function
A fixed amount each month is a constant rate: linear.
Why the other answers are wrong
- B. An increasing exponential function
- Exponential growth would add a fixed PERCENTAGE each month.
- C. A decreasing linear function
- The balance is rising.
- D. A quadratic function
- No squared relationship.
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