Casio fx-7400G PLUS Booklet page 37

1-6. Quadratic Regression
Q
After pressing
3
Next, press (X^2) to display the
quadratic regression result.
quadratic
This shows that
1-7. Data Estimation Using Regression
The results can be used to estimate the density of a 50% ethanol solution as follows.
(–7.026 10 –6
The above is performed in the RUN Mode.
1-8. Copy of Regression Graph to Graph Menu
3
You can use
step 1-6 to the graph menu.
After using the graph menu to display a graph, you can use
the trace mode to determine the value of Y for any value of X.
!1
Use (TRCE) to move the cursor. The sample screen shows the value of Y when
the cursor is moved to X = 50. This is virtually the same value obtained in step 1-7.
to exit the graph screen, press
regression is appropriate for this exercise.
) 50 2 + (–1.475
(COPY) to copy the nearby screen from
1
(GRPH)
4
regression graph.
10 –3 ) 50 + 0.99405 = 0.902735
– 34 –
EC-1 Density of a Liquid
1
(GPH1) again.
(DRAW) draws the quadratic