I'm bored haha, anyone else lol

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.

Percent increase and decrease. original number: 45 new number: 18

Multiplying fractions by whole number 5 x 1/3=?