Casio fx-7400G PLUS Booklet

– 4 –
5. Draw graph 2.
Press Q1(GRPH)1(GPH1).
The graph that appears is a scatter diagram.
6. Perform quadratic regression.
Press 3(X^2) to perform quadratic regression and obtain
the function.
Press
4(DRAW) to draw the graph, which is overlaid onto
the scatter diagram as shown to the right.
7. Check the function.
Check 3(X^2) again to display the parameter screen shown
to the right. This provides us with the following function.
s = f(t) = 0.13888 t
2
=
1
t
2
7.2
In this exercise, the quadratic regression overlaid nicely onto the scatter diagram. When the
overlay is not as successful the one used here, try returning to the graph screen and using
linear regression, logarithmic regression, or some other type of regression.
Summary
E-2 Function Expressing the Relationship Between Time Taken and Distance Traveled

Casio fx-7400G PLUS Specifications

General

Model	fx-7400G PLUS
Category	Graphing Calculator
Display	LCD
Display Lines	8
Display Characters	21
Memory	28 KB
Power Supply	Battery
Programming	Yes
Graphing	Yes
Equation Solver	Yes
Statistical Functions	Yes
Connectivity	No
Battery	AAA x 4