Below are graphs of twelve functions. Some are invertible on the domain shown and some are not. Can you sort them out?
You might think about…
- is the function one-to-one or many-to-one?
- how could you restrict the domain to make an invertible function?
- can you find a restricted domain that makes an invertible function with the same range as the unrestricted function?
Graph 1 
Graph 2 
Graph 3 
Graph 4 
Graph 5 
Graph 6 
Graph 7 
Graph 8 
Graph 9 
Graph 10 
Graph 11 
Graph 12 
