Sharp EL9900C EL-9900C - Page 172
equation name to store]
UPC - 074000016873
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Chapter 10: Statistics & Regression Calculations 11 Rg_x-1 Rg_x-1 (list name for x, list name for y [, frequency list] [, equation name to store]) Finds the regression curve using the reciprocal function. (reciprocal regression) Formula: y = a + bx-1 Parameters: a, b, r, r2 12 Rg_axb Rg_axb (list name for x, list name for y [, frequency list] [, equation name to store]) Finds the regression curve using the power function. (power regression) Formula: y = axb Parameters: a, b, r, r2 13 Rg_logistic Rg_logistic (list name for x, list name for y [, frequency list] [, equation name to store]) Finds the regression curve using the logistic function. (logistic regression) Formula: y = c ÷ (1 + ae-bx) Parameters: a, b, c 14 Rg_sin Note: Rg_sin ([iterations,] list name for x, list name for y [, frequency list] [, period] [, equation name to store]) Finds the regression curve using the sine function. The calculator will fit a sine curve for unequal and equal spacing. Formula: y = a sin(bx + c) + d Parameters: a, b, c, d The default iterations value is 3. The user may specify the value up to 25. To raise the accuracy, set the iterations value to 25 and enter 2π/b to the period, where b = result obtained from the calculation beforehand. 162