Direct and Indirect Variations

Direct and Indirect Variations

1. a:b::c:d, then a/b= c/d

2. A proportion is an expression which shows that two ratios are equivalent.

3. In inverse if one variable increases the other variable decreases proportionately and vice versa

4. In direct variation if one variable increase the other variable also increase proportionately and vice versa

5. If a person finishes a given piece of work in n number of days,then in one day she does 1/n of the given work.

6. In case of a tank, if it fills in m minutes, then in one minute 1/m of the tank is filled

7. when the variation in one variable (increases or decrease) results in a proportion variation(increase or decrease) in the second variable, the two variable are in direct proportion

8. A ratio is a comparision of two quantities by division.