Sharp EL-9900 - Manual (Page 70)

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Chapter 4: Basic Graphing Features — Basic Keyboard
k: Calculations can be performed on the entered graph equation(s).
Press @ k to access. The following 6 sub-menu tools are
available:
1 Value With this sub-menu tool, the Y value can be obtained
by entering an X value. The flashing graph cursor will
then be placed in that position on the graph. If more
than one graph equation is set, use the { or
} keys to switch to the equation you wish to work
with.
Note: If the entered X value
is incalculable, an
error message will be
displayed. Also, if the
Y value exceeds the
calculation range, then “----” will be displayed instead.
2 Intsct With this tool, the intersection(s) of two or more graphs
can be found, where the flashing cursor will be placed.
When the intersection is found, then the X-Y coordi-
nates of the intersection will be displayed at the bottom
of the screen. If there is more than one intersection,
the next intersection(s) can be found by selecting the
tool again.
Note: If there is only one
graph equation
entered there will be
no other graph(s) to
form an intersection,
so selecting this tool
will result in an error.
3 Minimum Finds the minimum of the given graph, and places the
flashing cursor at that position.
Note: If the given graph has
no minimum value,
an error message will
be displayed.