Help help math math math please

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.

Find the missing factor. 7s2 + 25s + 12 = (s + 3)( ).

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.