Sharp EL-9900 Operation Manual page 11

E O
xtra ptions
The EL-9900 has detailed settings, as shown below, so that graphs can be displayed
in various formats.
B EXPRESS Choose this setting to display
the written form of equations
on the graph screen.
The numeric derivative (dx/dy)
C Y'
can be displayed on the graph
screen.
D AXIS
The graph axes can be made
invisible with this menu item.
An X-Y grid can be displayed
E GRID
in the background.
Using the DRAW function, you can also add lines, circles and dots to the graph
screen, and change the settings for line appearance and for shading. Below are two
examples.
D LINE Sets the line appearance of
each graph to solid line, dotted
line, bold line, locus or dots.
Use this function to illustrate
G SHADE
inequalities, intersections and
complements of multiple graphs.
(Displays in bold outline are the default settings.)
EXPRESS ON
Y' ON
AXIS ON
GRID ON
Normal
Normal
EXPRESS OFF
Y' OFF
AXIS OFF
GRID OFF
Line appearance changed
Shaded
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