Becky created a number plumber which multiplies by 5 and subtracts 4. What do you notice about the numbers that it produces? Can you explain your findings?
Explore the relationship between simple linear functions and their graphs.
Explore Alex's number plumber. What questions would you like to ask? Don't forget to keep visiting NRICH projects site for the latest developments and questions.
Charlie has created a mapping. Can you figure out what it does? What questions does it prompt you to ask?