• The closer the (Left Side) − (Right Side) result is to zero, the higher the
accuracy of the solution.
Important
• SOLVE performs convergence a preset number of times. If it cannot find
a solution, it displays a confirmation screen that shows “Continue:[=]”,
asking if you want to continue. Press
to continue or
to cancel the
SOLVE operation.
• Depending on what you input for the initial value for
x
(solution variable),
SOLVE may not be able to obtain solutions. If this happens, try changing
the initial value so they are closer to the solution.
• SOLVE may not be able to determine the correct solution, even when one
exists.
• SOLVE uses Newton’s method, so even if there are multiple solutions,
only one of them will be returned.
• Due to limitations in Newton’s method, solutions tend to be difficult to
obtain for equations like the following:
y = sin
x
, 𝑦 = 𝑒
𝑥
, 𝑦 = 𝑥
.
Statistical Calculations
Perform the steps below to start a statistical calculation.
1. Press
, select the Statistics Mode icon, and then press
.
2. On the Select Type screen that appears, select a statistical calculation
type.
To select this type of statistical calculation:
Press this key:
Single-variable (
x
)
(1-Variable)
Paired-variable (
x
,
y
), linear regression
(y=a+bx)
Paired-variable (
x
,
y
), quadratic regression
(y=a+bx+cx
2
)
Paired-variable (
x
,
y
), logarithmic regression
(y=a+b
･
ln(x))
Paired-variable (
x
,
y
),
e
exponential regression
(y=a
･
e
^(bx))
Paired-variable (
x
,
y
),
ab
exponential regression
(y=a
･
b^x)
Paired-variable (
x
,
y
), power regression
(y=a
･
x^b)
Paired-variable (
x
,
y
), inverse regression
(y=a+b/x)
• Performing any of the above key operations displays the Statistics
Editor.
Note:
When you want to change the calculation type after entering the
Statistics Mode, perform the key operation
(Select Type) to display
the calculation type selection screen.
Inputting Data with Statistics Editor
Statistics Editor displays one, two, or three columns: single-variable (
x
),
single variable and frequency (
x
, Freq), paired-variable (
x
,
y
), paired-
variable and frequency (
x
,
y
, Freq). The number of data rows that can be
input depends on the number of columns: 160 rows for one column, 80
rows for two columns, 53 rows for three columns.
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