Question

y varies inversely as twice x When x = 4, y = 1. Find y when x = 5.

Answer 1

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

Answer 2

Replace x with 4 and y with 1 and find k.

Answer 3

What did you get for k?

Answer 4

k = 2x * y = 2 *4 * 1 = 8
If x = 5, y = k/2x = 8/ 2* 5 = .8