MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Direct Proportion

If y ∝1x an...

Question

If $y \propto \frac{1}{x}$ and x = 7 when y = 9, find the constant of variation (k).

Open in App

Solution

$y \propto \frac{1}{x}$
$\Rightarrow y = \frac{k}{x}$
Where, k = constant of variation
$∴ (P u t x = 7, y = 9)$
$k = x y$
$∴ k = 7 \times 9$
$∴ k = 63$

Suggest Corrections

thumbs-up

0

Similar questions

x

' varies inversely as '

y

x = 7

y = 9

:
(a) Find constant of variation

(k)

.
(b) Write equation of variation.
(c) Find '

y

x = 9

y \propto x

x = 7

y = 21

, find the constant of variation

(k)

x

varies inversely as

y

x = 7

y = 9

.
(a) Find constant of variation

k

.
(b) Write equation of variation.
(c) Find

y

x = 9

x \propto y

x = 20

y = 5

, find the constant of variation

(k)

If x and y vary inversely as each other and
(i) x=3 when y = 8, find y when x=4
(ii) x=5 when y = 15, find x when y = 12
(iii) x=30, find y when constant of variation = 900
(iv) y = 35, find x when constant of variation = 7.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Introduction to Direct Proportions

MATHEMATICS

Watch in App

explore_more_icon

Explore more

Direct Proportion

Standard VIII Mathematics

Join BYJU'S Learning Program

CrossIcon