Question 19

Question

Which situation could be modeled by a linear function?
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1 point
A. A bank account that grows at a rate of 5% per year, compounded annually
B. A population of bacteria that doubles every 4.5 hours
C. The cost of cell phone service that charges a base amount plus 20 cents per minute
D. The concentration of medicine in a person's body that decays by a factor of one-third every hour

Answer 1

The situation that could be modeled by a linear function is:

C. The cost of cell phone service that charges a base amount plus 20 cents per minute.

This is linear because the cost increases at a constant rate (20 cents for each additional minute).

The other options describe exponential growth or decay, not linear functions.