Texas Instruments TINSPIRE Teacher Software Guidebook - Page 482

- Create a persistent point that remains on the graph while in Graph Trace mode by pressing · when the trace point reaches the point you want to label. - Trace through and identify the points at which the graph has no defined value (a discontinuity) for a coordinate. The coordinate pair (x, undef) displays when you trace a point with an undefined x coordinate. Notes: - When you select or trace a graph or plot on the work area, that relation displays on the entry line. - When you trace beyond the initially visible graph, the screen pans to show the area being traced. 4. Exit Graph Trace by pressing d or by choosing another tool. Tracing all graphs The Trace All tool works like Graph Trace, but allows tracing multiple functions simultaneously. With several functions graphed on the work area, perform the following steps: Note: The Trace All tool traces only function graphs, not plots of other relations (polar, parametric, scatter, sequence). 1. Choose Trace All from the Trace menu. A vertical line indicates the x value of the trace and a trace point appears on each function graphed on the work area. 2. Press 7 or 8 to move the trace point along each graph on the work area simultaneously. 3. Exit Trace All by pressing d or by choosing another tool. Working with relations The entry line under the work area lets you specify relations in the format supported for each graph type. Using the entry line The entry line displays at the bottom of the work area. You can specify multiple relations for each graph type. The default graph type is Function, so the form f1(x)= displays. 1. To graph a function, select a graph type. - To graph a function, select Function on the Graph Type menu. 470 Graphs & Geometry