Graphs; Built-In Function Graphs - LEXIBOOK GC500i Instruction Manual

Example
MODE
xi yi
28 2410 SHIFT
30 3033
33 3895
In
35 4491
In
38 5717
In
In
In
The data in the above can be
used to obtain the terms of
SHIFT
the regression formula and
the correlation coefficient.
SHIFT
Based on the regression
^
formula, estimated value y
SHIFT
can be obtained for xi=40,
^
and estimated value x can be
In
obtained for yi=1000. e x
In
e x

3. GRAPHS

3.1 BUILT-IN FUNCTION GRAPHS

The COMP mode of the RUN mode should be used when graphing function. Some graphs can be produced in the
SD and LR modes, but certain graphs cannot be produced in these modes. The BASE-N graphs making it possible to
produce the graphs of basic functions.
sin cos
sh ch
√
x
− 2
√
X
-1 3 −
Any time a built-in graph is executed, the ranges are automatically set to their optimum values, and any graph pre-
viously on the display is cleared.
Example 1: Sine curve
+
MODE
Graph sin EXE
3.1.1 Overdrawing built-in function graphs
Two or more different built-in function graphs can be drawn together on the same display. Since the range
for the first graph is automatically set, all subsequent graphs on the same display are produced according
to the range of the first graph.
The first graph is produced by using the previously mentioned operation (Graph [function key]
Subsequent graphs are produced using the variable x in the operation Graph [function key]
. By inputting
X EXE
ALPHA
next graph is produced without clearing the existing display
Copyright L 2002
EXIBOOK
Key Operation
÷
Scl
EXE
28 , 2410
DT
SHIFT
,
30 3033
DT
SHIFT
,
33 3895
SHIFT DT
,
35 4491
DT
SHIFT
,
38 5717
SHIFT DT
e x SHIFT A EXE
B EXE
R EXE
40 y ^
SHIFT EXE SHIFT
Ans
SHIFT EXE
1000 ^
SHIFT x
EXE SHIFT
Ans
SHIFT
EXE
tan arcsin (sin )
-1
th argsh
log ln
Example 2: y = 1/x graph
Graph x -1
after the function key, the range is unchanged and the
X
ALPHA
Display Remark
Clear memory
3.33220451
3.401197382
3.496507562
3.555348062
3.63758616
0.238801069 Constant term A
2.771866156 Regression coefficient B
0.998906253 Correlation coefficient r
^
6587.674787 y when xi=40
^
20.26225681 x when yi=1000
Arcos (cos ) Arctan (tan )
-1 -1
argch argth
10 e
x x
EXE
).
EXE
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GB