Question

The quantity z varies directly with y and inversely with x When y = 12 and x = -12, z = -6. What is the value of k, the constant of variation?

Write your answer in the form A or A/B, where A and B are constants or variable expressions.

Answer 1

Z = ky/x where y=12, x=-12 and z=-6

-6= k(12)/-12

-k = - 6

K = 6