Question

Please help
y∝1/√x If y=5
when x=36 find,
x when y=3

Answer 1

x = 100.

Explanation:

y ∝ 1/√x

y = k /√x where k is a constant.

When x = 36 y = 5 so we have:

5 = k / √36

5 = k / 6

k = 30

So we have the relation:

y = 30 /√x

When y = 3

3 = 30/ √x

√x = 30/3 = 10

x= 100.