(i) Number of articles (x) and their price (y)
If number of articles is increasing then cost will also increase. So it is a case of direst proportion
(ii) Weight of articles (x) and their cost (y).
When weight of the article is increasing then cost also increase. So it is a case of direst proportion
(iii) Distance x and time y, speed remaining the same.
Time increases when distance increases, if speed *** constant. So it is a case of direst proportion
(iv) Wages (y) and number of hours (x) of work.
Wages increases if the number of working hours increases. So it is a case of direst proportion
(v) Speed (x) and time (y) distance covered remaining the same).
For same distance time taken will reduce if speed is increased. So it is not a case of direst proportion
(vi) Area of a land (x) and its cost (y).
Cost of the land increases if its area increases. So it is a case of direst proportion
