Question

y varies inversely as twice x. When x = 9, y = 2. Find y when x = 3.

Answer 1

y varies inversely as twice x means
y = k * (1/2x)

Put x = 9, y = 2 in y = k *( 1/2x)
2=k * (1/(2*9))
so k=18*2=36

To find y when x = 3
so putting x=3 and k= 36

y=36/(2*3)
=36/6
=6

Answer 2

thanks u