3
How to Operate
Mode key
<Example>
1. KEY LAYOUT
≈Read Before Using≈
This operation guide has been written based on the EL-W531X, EL-W535X, EL-W531XH,
EL-W531XG, EL-W531, EL-W506X, EL-W516X and EL-W506 models. Some functions
described here are not featured on other models.
In addition, key operations and symbols on the display may differ according to the model.
(SD): Single variable statistic calculation
(LINE): Linear
regression calculation
(QUAD): Quadratic regression calculation
(E_EXP): Eular Exponential regression calculation
(LOG): Logarithmic regression calculation
(POWER): Power regression calculation
(INV): Inverse regression calculation
(EXP): Exponential regression calculation
2nd function, ALPHA keys
Pressing these keys will enable the
functions written in orange (2nd F)
or green (ALPHA) above the
calculator buttons.
This calculator can operate in three different
modes as follows.
[Normal mode]
•Mode = 0; normal mode
for performing normal
arithmetic and function
calculations.
ON/C, OFF key
Direct function
<Power on>
<Power off>
2nd function
Written in orange
above the ON/C key
(EL-W506X/EL-W516X/EL-W506 only)
[STAT mode]
•Mode = 1; mode for
performing 1- or 2-variable
statistical calculations. To
select the statistical sub-
mode, press the
corresponding number
key after .
[Drill mode]
•Mode = 2; mode for
performing drill
calculations. To select the
drill sub-mode, press the
corresponding number
key after .
(MATH): Math drill
(TABLE): Multiplication table drill
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