Objective: To determine the inverse of quadratic functions

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 curve traced by*A’*? - Explore the inverse of other quadratic functions. Click the REFRESH icon to restart construction then change the quadratic function by moving the slider,
*a*. - The graph traced by
*A’*is the inverse of the quadratic function. If someone will ask you what an inverse of a function is, what will you tell him/her based on this activity. Is the inverse of a function also always a function?

For worksheet on inverse of linear function click this link or you can advance to inverse of exponential function.

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