arlier in this investigation we provided the following example of function inverses. For example, Let n represent the number of pounds of walnuts purchased. Let c represent the total cost in dollars for purchasing n pounds of walnuts. c is a function of n and we will call this function f . So f ( n ) = c . However, n is also a function of c . Untried Using function inverse notation, represent n as a function of c . f 1 ( ) =