Objective: To determine the inverse of a linear function

Instruction:

- Type
*y = x*in the input bar then press enter. - Click the REFLECT button in the tool bar. Click point A and then the line
*y = x*. - Drag
*A*. Describe the path of point*A’*. You can right click*A’*and choose TRACE. What equation will describe the line traced by*A’*? - You can click the REFRESH icon to start your construction. You can change the given line by moving the slider,
*a*. - The line traced by
*A’*is the inverse of the function represented by the line. If someone will ask you what an inverse of a function is, what will you tell him/her based on this activity.

Click here to take you to the activity on inverse of quadratic function.

For ideas on how to teach inverse function, read my post *What is inverse function*?