Consider the following diagrams:
x men, working at constant speed, do a certain job in y days. Which one of these diagrams shows the relation between x and y?
(a) Diagram I (b) Diagram II (c) Diagram III (d) Diagram IV
(d) Time taken to finish a work is inversely proportional to the number of persons working at it.
∴ More persons then less is the time taken to finish a job. Hence, diagram IV represents the relation between x and y.
