Sharp EL-9900 - Manual (Page 170)

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Chapter 10: Statistics & Regression Calculations
5. Regression Calculations
1. Press S D REG.
The Regression menu is displayed.
01 Med_Med Med_Med (list name for x, list name for y [, frequency list] [,
equation name to store])
Finds the regression line using the median-median method.
(linear regression)
Formula: y = ax + b
Parameters: a, b
02 Rg_ax+b Rg_ax+b (list name for x, list name for y [, frequency list] [,
equation name to store])
Finds the regression line. (linear regression)
Formula: y = ax + b
Parameters: a, b, r, r 2
03 Rg_a+bx Rg_a+bx (list name for x, list name for y [, frequency list] [,
equation name to store])
Finds the regression line. (linear regression)
Formula: y = a + bx
Parameters: a, b, r, r 2
04 Rg_x 2 Rg_x 2 (list name for x, list name for y [, frequency list] [,
equation name to store])
Finds the regression line using the second degree polynomial.
(quadratic regression)
Formula: y = ax 2 + bx + c
Parameters: a, b, c, R 2
05 Rg_x 3 Rg_x 3 (list name for x, list name for y [, frequency list] [,
equation name to store])
Finds the regression line using the third degree polynomial. (cubic
regression)
Formula: y = ax 3 + bx 2 + cx + d
Parameters: a, b, c, d, R 2
Accessing the
regression menu