19990401
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 .....
y
=
ax
2
+
bx
+
c
a .............
regression second coefficient
b .............
regression first coefficient
c .............
regression constant term (intercept)
Cubic regression
Model formula .....
y
=
ax
3
+
bx
2
+
cx
+
d
a .............
regression third coefficient
b .............
regression second coefficient
c .............
regression first coefficient
d .............
regression constant term (intercept)
Quartic regression
Model formula .....
y
=
ax
4
+
bx
3
+
cx
2
+
dx
+
e
a .............
regression fourth coefficient
b .............
regression third coefficient
c .............
regression second coefficient
d .............
regression first coefficient
e .............
regression constant term (intercept)
6-3-7
Calculating and Graphing Paired-Variable Statistical Data
Summary of Contents for ALGEBRA FX 2.0
Page 1: ... ALGEBRA FX 2 0 User s Guide ...
Page 19: ...19990401 ALGEBRA FX 2 0 ...
Page 26: ...19990401 1 1 Keys 1 1 1 Keys REPLAY COPY PASTE CAT CAL H COPY PRGM List Mat i ...
Page 122: ...19990401 ...
Page 280: ...19990401 ...
Page 310: ...19990401 ...
Page 358: ...19990401 8 8 2 Program Library egcw w ww w ...
Page 360: ...19990401 8 8 4 Program Library Example 1 Example 2 fw baw bf w fw baw ca w ...
Page 362: ...19990401 8 8 6 Program Library ...
Page 364: ...19990401 8 8 8 Program Library dw fcde wfcde wfcde fcde w daw w ...
Page 366: ...19990401 8 8 10 Program Library b awaw bwaw aw9d w ...
Page 423: ...19981001 MEMO ...
Page 424: ...19981001 MEMO ...
Page 425: ...19981001 MEMO ...