What is the horizontal line rule?  It's a variation of the vertical line test, of course.  Find out what it means to take the inverse of a function and restrict the domain.

Resources

• Notes: Inverse of a Function

Assignment

• p51 #1-6, 8, 9, 12, 15, 20, 21 C1 C2 C3

Things you should know after today:

• how to find the equation for the inverse of a function
• how the coordinates of a function, f(x), are related to the coordinates of the inverse function, f^-1(x)
• how the graphs of a function and its inverse are like reflections
• how the line y=x is important to reflections, functions and their inverse
• the horizontal line rule
• why a domain is restricted when making an inverse
• determine what happens when you do f(f ^-1(x))