Chain rule important formulas:

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Chain rule important formulas:
1.Direct Proportion:
Two quantities are said to be directly proportional, if on the increase (or decrease) of the one, the other increases (or decreases) to the same extent.
Example: Cost is directly proportional to the number of articles.
(More Articles, More Cost)
2.Indirect Proportion:
Two quantities are said to be indirectly proportional, if on the increase of the one, the other decreases to the same extent and vice-versa.
Example: The time taken by a car is covering a certain distance is inversely proportional to the speed of the car. (More speed, Less is the time taken to cover a distance.)
Note: In solving problems by chain rule, we compare every item with the term to be found out.

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