Casio ALGEBRA FX 2.0 Manual page 16

Calculating and Graphing Paired-Variable Statistical Data
k k k k k Quadratic/Cubic/Quartic Regression Graph
A quadratic/cubic/quartic regression graph represents connection of the data points of a
scatter diagram. It uses the method of least squares to draw a curve that passes close to as
many data points as possible. The formula that represents this is quadratic/cubic/quartic
regression.
Ex. Quadratic regression
4(CALC)e(Quad)
6(DRAW)
Quadratic regression
Model formula .....
a .............
b .............
c .............
Cubic regression
Model formula .....
a .............
b .............
c .............
d .............
Quartic regression
Model formula .....
a .............
b .............
c .............
d .............
e .............
6-3-7
2
y ax bx
= + +
regression second coefficient
regression first coefficient
regression constant term (intercept)
3 2
y ax bx
= + +
regression third coefficient
regression second coefficient
regression first coefficient
regression constant term (intercept)
4 3
y ax bx
= + +
regression fourth coefficient
regression third coefficient
regression second coefficient
regression first coefficient
regression constant term (intercept)
c
cx d
+
2
cx dx e
+ +
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