When there is an inverse relationship between y and x, the formula would be:
y = k/x ; where k is constant.
inverse relationship means when one variable increases, the other decreases.
y represents the demand
x represents the price
450 = k/3.5
k = 450 * 3.5
k = 1,575
The mathematical model that gives the demand y in terms of the price x in dollars is:
y = 1575 / x
