Question 328712
the formula for inverse variation is:


y = k/x


k is the constant of variation.


let y = cost per cd
let x = number of cd


y = k/x becomes:


2.50 = k / 10,000


Solve for k to get k = 10,000 * 2.50 = 25,000


Since k is a constant, it will not change.


cost when 100,000 cd are made would therefore be:


y = 25,000 / 100,000 = .25 per cd.