Question

if b is directly proportional 1/a, when b =15 ,a=6 . the equation of variation is _____
option
ab=2.5
b=90a
ab=90
ab=9
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Answer 1

Answer:

ab=2.5 is the answer

Step-by-step explanation:

is it correct

Answer 2

Answer:

Step-by-step explanation:

Given that,

b is directly proportional to 1/a

let, b = k/a (where k is proportionality constant)

now for b=15 and a=6

15 = k/6

or,k = 90

Therefore,b = 90/a

or,ab = 90