3-5-1

Modifying a Graph

3-5 Modifying a Graph

A graph can be modified in real time as you change its coefficients and/or the variables. The Graph & Table application provides you with two methods for modifying a graph.

Direct Modify

“Direct Modify” changes the coefficient in the equation of the original graph. This method can be used when you are modifying a single graph.

Dynamic Modify

“Dynamic Modify” changes the values assigned to common variables of multiple functions. Use Dynamic Modify when you want to modify multiple graphs at the same time.

Modifying a Single Graph by Changing the Value of a Coefficient (Direct Modify)

Use the following procedure to change the values of the coefficients of a function within a specific range to find out the effect the change has on the shape or position of the graph.

STo modify a single graph

Example: To graph the functions y = 2x2 + 3x – 1 and y = 2x + 1, and then find out how a change in the coefficients of each function affects the shape and position of the graphs

Note

Before starting the following procedure, check the Graph Format dialog box to make sure that the [G-Controller] setting is turned on. For information about the Graph Format dialog box, see page 1-9-6.

SClassPad Operation

(1)On the application menu, tap $.

(2)Configure View Window parameters.

(3)On the Graph Editor window, input 2x2 + 3x –1 in line y1, and 2x + 1 in line y2.

(4)Tap to graph the functions.

(5)Tap [Analysis] and then [Modify].

• This displays a dialog box for inputting the step.

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