difference between direct and inverse proportion ....

plz tell me fast ...............

Two quantities, *x* and *y*, are said to be in direct proportion, if they increase (decrease) together in such a manner that the ratio of their corresponding values remains constant. That is, , where *k* is a positive number.

Price of wheat and weight of wheat that can be brought at a fixed rate are in direct proportion. More the weight of wheat, more will be the cost. Therefore, this is a case of direct proportion.

Two quantities, *x* and *y*, are said to be in inverse proportion, if an increase in *x* causes a proportional decrease in *y* (and vice-versa) in such a manner that the product of their corresponding values remains constant. That is, *xy* = *k*, where *k* is a positive number.

Number of employees and time taken to finish a work are in inverse proportion. More the number of employees, less will be the time taken to finish the work. Therefore, this is a case of inverse proportion.

**
**