Question

Difference btw direct and indirect variation of unitary method

Answer 1

Answer:

two quantities a and b are said to vary inversely if the product ab remains constant.

suppose a car covers a certain distance at uniform speed. Then we can say for certain that more is the speed of the car.

thus speed varies inversely as the time taken to cover a certain distance.

Answer 2

Answer:

Direct Variation In Unitary Method: Two quantities x and y are set to be in direct variation with respect to each other if

1.) With increase in the value of x, the value of y also increases, or

2.) With decrease in the value of x, the value of y also decreases. For example more pens cost more and less pens cost less.

General Rule: If the expected value is more, we multiply and if the expected value is less, we divide.

Inverse Variation: Two quantities are said to be in inverse variation, if

1.) With an increase in the value of x, the value of y decreases.

2.) With decrease in the value of x, the value of y increases and vice-versa

General Rule: If the expected value is more than the present value, you multiply and if the expected value is lesser than the present value the you divide.

(Note: Sure hope this helps!)