HP 38g Graphing Calculator - Manual (Page 83)

Second-Page Those items with space for a checkmark are settings you can
turn on or off. Press {{PAGET}} to display the second page.
SIMULT If more than one function is being
plotted, plot them simultaneously
(otherwise sequentially).
INV. CROSS When the crosshairs cross the plot, invert
those pixels that are overlapping.
CONNECT Connect the plotted points. (Sequence
always connects them.)
LABELS Label the axes with XRNG and YRNG
values.
AXES Draw the axes.
GRID Draw grid points using XTICK and YTICK
spacing.
Interactive Root-Finding
You can find roots, intersections, slopes, and areas for a
function in the Plot view of the Function aplet (and any
Function-based aplets). The {{FCN}} operations act on the
currently selected expression or on the graph being traced.
The results are saved in the variables Area, Extremum, Isect,
Root, and Slope, so you can do further calculations with these
results in the aplet or in Home.
To use a 1. In Symbolic view in a Function aplet, select the expression
{{FCN}} (for Intersect, two expressions) whose curve you want to
operation study. Or trace the curve you want to study.
2. Position the cursor where you want it to be before pressing
{{FCN}}. If you cannot see the crosshairs, they might be on
the axes. Press 0 or 0 to move the cursor and make it
visible.
3. Press {{FCN}}, then select an operation from the menu list
and press {{OK}}.
4. To perform another operation, press {{MENU}} to turn the
menu-key labels back on.
Plotting and Exploring Functions S-19