Illustrative Mathematics
Illustrative Mathematics: F if the Customers
This is a beginning lesson on the concept of functions. The context is a business that has a database of customer names and phone numbers in a table and students must decide if a function is involved. Aligns with F-IF.A.1 and 8.F.A.1.
Khan Academy
Khan Academy: Even and Odd Functions: Graphs and Tables
Given the graph of a function, determine if it's even, odd, or neither.