If y varies inversely as x, and y = 2/5 when x = 2, find y when x = 1.?

Question

Homework help; please answer as soon as possible. Thank you, and God bless!

Answer 1

If y varies inversely as x, then y = k / x ...(1)

where k is constant.

Putting x = 2 and y = 2 / 5:

2 / 5 = k / 2

Multiplying by 2:

k = 4 / 5

Now put x = 1 in (1), and substitute the value of k:

y = (4 / 5) * 1

= 4 / 5.