Class Opener:
Identifying a Composite Function:
Identifying a Composition of Two Functions:
ORQ Practice: Bacteria Count:
Inverse Functions:
Finding the Inverse Function Informally
Verifying the Inverse Function Algebraically
One – to – One Functions A function is one to one if, for a and b in its domain, f(a) = f(b) implies that a = b. A function f has an inverse function if and only if f is one to one.
Testing for one to one functions
Testing one to one functions
Horizontal Line Test Use the horizontal line test on a graph of a function to see if it is one to one. If it is a function the horizontal line will only hit the function one time.