Question

For his services, a private investigator requires a $450 retention fee plus $95 per hour. Let x represent the number of hours the investigator spends working on a case.
(a) Find a function f that models the investigator's fee as a function of x
find f(x)
find f^-1(x)
find f^-1(1210)

Answer 1

f(x) = 450+95x
f^-1(x) = (x-450)/95
and so on