Which of the following situations describes a linear relationship? a jeri invested $2000 in a savings account that earns 6% interest compounded quarterly. b the population of a town decreased from 12000 to 11000 in one year and is expected to decrease by 3.5% each year for the next ten years. c a ball bounces to one-half it's previous height on each bounce. d the pathway from the entrance of a cave to the bottom descends at a 5%-grade 24 points