Chapter 17: Activities 473
4. Press r. The trace cursor is
displayed on the
Y1 function.
The function that you are tracing is
displayed in the top-left corner.
5. Press | and ~ to trace along
Y1, one X
dot at a time, evaluating
Y1 at each X.
You also can enter your estimate for the
maximum value of
X.
6. Press
3 Ë 8. When you press a number
key while in
TRACE, the X= prompt is
displayed in the bottom-left corner.
7. Press Í.
The trace cursor jumps to the point on
the
Y1 function evaluated at X=3.8.
8. Press | and ~ until you are on the
maximum
Y value.
This is the maximum of
Y1(X) for the X
pixel values. The actual, precise
maximum may lie between pixel values.
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