# PreCalc!

posted by
**Marissa** on
.

sketch a graph whose domain is the interval [0, infinity) but whose domain must be restricted to [0,4] so that the function can have an inverse. (The only one i can think of is a parabola but she said we cant use that one)

Consider the 2 statements:

I. if f(a)=b then f(inverse)(b)=a

II. if f(inverse)(b)=a then f(a)=b

Which statement is NOT necessarily true if f(x) does not pass the horizontal line test and WHY?