Question

if × varies inversely as y then 3 =​

Answer 1

Answer:

If x varies inversely as y and x=7 when y=9.

(a) Find constant of variation k.

(b) Write equation of variation.

(c) Find y when x=9.

Easy

Solution

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(a) x∝

y

1

⇒x=

y

k

⇒7=

9

k

⇒k=7×9

∴k=63

(b) x=

y

63

(c) y=

x

63

⇒y=

9

63

∴y=7.

your ans is y-7