This is the second of a series of Starter activities in which students are shown a movie of a mapping diagram and are asked to identify the function.
The values of x and y change continuously in the movie and are shown only fleetingly. Run the movie several times and ask students to describe what they see. 'How does the mapping arrow change?'
Now PAUSE the movie at judicious moments. 'What is the relation between x and y?'
NOTE: If needed, you can download a free copy of the QuickTime movie player from here: