FUNCTIONS Inverse Functions (Page 1 of 9)

All functions have an inverse relation. To determine if a function is one-to-one and has an inverse that is also a function, the horizontal line test is used.

Let's use the horizontal line test to see if the function f(x) = x^3-2x+3 is a one-to-one function. We do this using a DRAW command. First, enter the function as Y1 and graph it.

 Y= key. (Clear any previous functions)

 X,T,theta,n key. Caret key. 3 Minus key. 2 X,T,theta,n key. Plus key. 3

 ZOOM key. 6: menu selection.

 Calculator screen image. Calculator screen image.
Copyright © 2010 Turner Educational Publishing
Go back to the previous page. Go to the next page. Go to the Table of Contents. Go to the Index page. Go to the Quiz page. Exit to the Home page.