Q6 of 41 Page 11

Find the constant of variation from the table given below:

















x



3



5



7



9



y



12



20



28



36



Set up table and solve the following problems. Use unitary method to verfy the answer.

The constant of variation in the given table is 4.


Explanation: For First Column:


For Second Column:


Similarly for other columns also y is four times x.


More from this chapter

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4

Fill in the blanks in each of the following so as to make the statement true:

(i) Two quantites are said to very _______ with each other if they increase (decrease) together in such a way that the raio of the corresoponding values remains same


(ii) x and y are said to very directly with each if for some positive number k, _______ = k.

 5

Complite the following tables given that x varies directly as y.

(i)


















X



2.5



……….



……….



15



Y



5



8



12



……….



(ii)






















X



5



……



10



35



25



…….



Y



8



12



….



…….



…….



32



(iii)




















X



6



8



10



…….



20



Y



15



20



….



40



…….



(iv)






















X



4



9



……



…….



3



….



Y



16



…..



48



36



……



4



(v)


















X



3



5



7



9



2



…..



20



28



……


 7

Rohit bought 12 registers for Rs 156, find the cost of 7 such registers.

 8

Anupama takes 125 minutes in walding a distance of 100 metre. What distance would she cover in 315 minutes?