59
Graphing Chapter 4
kk
kk
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
uu
uu
uTo use trace to read coordinates
Example To determine the points of intersection for graphs produced by
the following functions:
Y1: y = x
2
– 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 make the pointer appear at the far
left of the graph.
1(TRCE)
• The pointer may not be visible on the graph when you press 1 (TRCE).
2. Use e to move the pointer to the first intersection.
e
~ e
x/y
coordinate values
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