User`s guide

Graphing Chapter 4

k Trace

With trace, you can move a flashing pointer along a graph with the f, c, d, and

e cursor keys and obtain readouts of coordinates at each point. The following

shows the different types of coordinate readouts produced by trace.

•Rectangular Coordinate Graph • Parametric Function Graph

•Inequality Graph

uTo use trace to read coordinates

Example To determine the points of intersection for graphs produced by

the following functions:

Y1:

y = x

– 3

Y2:

y = –x + 2

Use the following View Window parameters.

Xmin = –5 Ymin = –10

Xmax = 5 Ymax = 10

Xscl = 1 Yscl = 2

1. After drawing the graphs, press 1 (TRCE) to display the pointer in the center of

the graph.

1(TRCE)

• The pointer may not be visible on the graph when you press 1 (TRCE).

2. Use d to move the pointer to the first intersection.

~ d

x/y

coordinate values