Which of these are examples of direct proportions:-
(i) Total amount to the number of groceries.
(ii) Time required in completing a work to number of workers doing that work.
(iii) Distance covered to time when speed is constant.
(i), (iii)
(i) The amount increases as the number of groceries purchased increases and vice-versa.
(ii) Time required in completing a work is inversely proportional to number of workers doing that work. If workers are more in number then work can be done in less time and vice-versa.
(iii) Distance covered is directly proportional to time when speed is constant and vice-versa.