Acontainer of motor oil is supposed to contain 1000 ml of oil. a quality control engineer is concerned about the variability of the filling process. she randomly selects 10 containers. the number of ml in each container is given below:

At the beginning of the year, adrian's savings account balance was \$28$28. each week, he deposits another \$15$15 into that account, and he doesn't spend any of his savings. is his savings account balance proportional to the number of weeks since the start of the year?