Find the equation of variation where y varies inversely as x, and y=0.7 and x= 0.5?

Question

Help Im stuck.

Answer 1

y is proportional to 1/x
y = k/x
Solve for k
k = x*y = 0.7 * 0.5 = 0.35.
So
y = 0.35/x

Answer 2

x = a/y

(where a is the proportionality constant)

0.5 = a/0.7
a = 0.35.

So your equation is x = 0.35/y

or y = 0.35/x

Answer 3

y = k / x
xy = k
0.5 x 0.7 = k
k = 0.35
y = 0.35 / x