Quadratic Regression - HP 10s+ User Manual

• The corresponding regression formulas are:
Logarithmic
regression
Exponential
regression
Mathematical
Power regression
Inverse regression

Quadratic Regression

• The regression formula for quadratic regression is
y = A+Bx+Cx
• Example: In this example, we
perform quadratic regression on the
given data to determine the
regression formula and then use
the formula to calculate
estimated value of
and the
value of ) when
In regression (REG) mode:
  (Quad)
  
2
y
value (the estimated
x
x yi
(Scl)  (Stat clear)
74
y = A+B•lnx
·x
B
y = A•e
x
y = A•e (lny = lnA+B lnx)
y = A+B•1/x
y (the
xi
) when
= 20.
29 1.6

 38.0 
27
(lny = lnA+Bx)
xi
29
50
74
103
= 16
118
50
 
103 
118 
yi
1.6
23.5
38.0
46.4
48.0
23.5

46.4 
48.0 