Using TRACE! By: Caroline Dingwall

Using TRACE Feature

1. The TRACE feature is a wonderful tool for understanding the various characteristics of a graph. For illustration purposes we'll use the graph . Enter this equation as Y1 on the Y= screen.

2. Then use the GRAPH key to graph the function. In this case please graph the function on the standard window by hitting ZOOM 6.

3. After pressing ZOOM 6 the graph should appear. To use the trace feature press the TRACE key. A cursor should appear on the graph at the y-intercept (0, -5.625).

4. We can walk the cursor along the curve in either direction by using the arrow right and arrow left keys.

5. Because the location of the cursor is constantly displayed as we move, finding intervals where the function is positive or negative is simply a matter of watching the sign of y. Use this feature to find the x and y intercepts or points of intersection and more! (Helpful website) http://highered.mcgraw-hill.com/sites/0073022845/student_view0/calculator_keystroke_guide.html Caroline Dingwall ♫♫♫♫