Is #1 a function?
What is the domain for #1? Remember not to repeat any numbers, and they must be in order from least to greatest.
What is the range for #1?
Is #2 a function?
What is the domain for #2
What is the Range for #2?
Is #3 a Function?
What is the Domain for #3?
What is the Range for #3
Is #4 a function?
What is the Domain for #4?
What is the Range for #4?