The variable of z

Question

The variable z is inversely proportional to x. When x is 6, z has the value of 2. What is the value of z when x=13

Answer 1

z = k/x

Since z = 2 when x = 6, we have 2 = k/6.

So, k = 12

z = 12/x

Therefore, when x = 13, z = 12/13