Hi I really need help on this and I need a step by step clarification on this ASAP. Are my answers right or wrong?

Which of the following situations represents a linear relationship? a. theresa increases the distance she runs by 0.1 miles every week. b. the volume of a box depends on the length of box. c. the amount of money in a bank account increases by 1 percent each year. d. the population of a town doubles every 5 years.

Can someone me with this problem . show your work .

Ineed in figuring out this problem.