Casio fx-9750G PLUS - Manual (Page 290)

262
6 (DRAW)
a ...... Med-Med graph slope
b ...... Med-Med graph y -intercept
k k k k k
Quadratic/Cubic/Quartic Regression Graph
P.254 A quadratic/cubic/quartic regression graph represents connection of the data
points of a scatter diagram. It actually is a scattering of so many points that are
close enough together to be connected. The formula that represents this is
quadratic/cubic/quartic regression.
Ex. Quadratic regression
3 (X^ 2)
1 2 3 4 5
6
6 (DRAW)
Quadratic regression
a ...... regression second coefficient
b ...... regression first coefficient
c ...... regression constant term ( y -intercept)
Cubic regression
a ...... regression third coefficient
b ...... regression second coefficient
c ...... regression first coefficient
d ...... regression constant term ( y -intercept)
Quartic regression
a ...... regression fourth coefficient
b ...... regression third coefficient
c ...... regression second coefficient
d ...... regression first coefficient
e ...... regression constant term ( y -intercept)
18 - 4
Calculating and Graphing Paired-Variable Statistical Data