Question

y varies inversely as twice x. When x = 3, y = 6. What is the value of y when x = 9?

Answer 1

3 X 6 = 18
18 / 9 = 2
Y=2

Answer 2

\[y \alpha \frac{1}{x}\]
y=k/x
find k, by sustituting x and y
then using the constant find the value of y

Answer 3

so basically,

\[y \alpha \frac 1 {2x}\]

or \[y = \frac k {2x} \]

k=constant


now,

when x=3, y=6

put x and y in the equation, you find 'k'=36

so, now you have k=36, x=9. can you find the answer now?

Answer 4

@thush its 'twice' x