HP 10s+ - Logarithmic, Exponential, Mathematical Power and Inverse Regression; Quadratic Regression

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• The corresponding regression formulas are:
Quadratic Regression
• The regression formula for quadratic regression is
y = A+Bx+Cx
2
• Example: In this example, we
perform quadratic regression on the
given data to determine the
regression formula and then use
the formula to calculate (the
estimated value of ) when = 16
and the value (the estimated
value of ) when = 20.
In regression (REG) mode:
  (Quad)
   (Scl)  (Stat clear)
29
 1.6  50  23.5 
74  38.0  103  46.4 
118  48.0 
Logarithmic
regression
y = A+B•lnx
Exponential
regression
y = A•e
B ·x
(lny = lnA+Bx)
Mathematical
Power regression
y = A•e
x
(lny = lnA+B lnx)
Inverse regression y = A+B•1/x
29 1.6
50 23.5
74 38.0
103 46.4
118 48.0
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