You can use the Dyna Graph app to input a function like $y=\text{A}x+\text{B}$, which includes alpha variables as coefficients. A displayed graph is continuously re-drawn as the value of a specific coefficient of its function is varied within a specific range. A Dynamic Graph makes it possible to observe the effect of coefficient values on the form and position of a graph.

Example:  To select the Dyna Graph app’s $y=$ Asin$(\text{B}x+\text{C})$ built-in function and input it. Observe the change in the graph as the value of the coefficient B of the function is varied. Specify a value of 1 for A and C.

1. h > Dyna Graph

This displays the Function tab.

2. Select T > [Built-In Function] > [‎$y$‎=‎Asin‎(B$x$‎+C)].

This inputs the function you select.



3. Press >, or highlight and then press O.

4. In the Setup tab that appears, specify the variable name of the coefficient whose value is to be varied.

1. Highlight [Variable] and then press O.

2. On the menu that appears, highlight [B] and then press O.



5. Assign values to the variables for each of the other coefficients.

d1E1E



6. Press > (or highlight and then press O.)

This displays the View Window menu. See Specifying the Display Range of the Graph Window (View Window) for details.

7. Configure View Window settings and draw the graph.

1. Select [Pre-set Windows] > [Trigonometric].

2. Highlight and then press O.

The graph is continually re-drawn as the value of coefficient B is increased or decreased within the range of 1 and 5, in increments of 1 (default setting^*1).

The Setup tab reappears after 10 iterations of coefficient value increase and decrease (default setting^*2).




To interrupt re-drawing of the graph and return to the Setup tab, press a.

You can enter up to 20 functions on the Function tab.

1. On the Function tab, highlight the first line and then press O.

2. On the Setup menu that appears, select [Type].

This displays the Type menu.

3. Perform the operations shown in the table below.

To select this function type:	Select this menu item:
Cartesian coordinate type ($y\text{=}f\text{(}x\text{)}$ form)	[$y$=]
Polar coordinate type ($r\text{=}f\text{(}\theta \text{)}$ form)	[r‎=‎]
Parametric type ($\{\begin{array}{c}\mathrm{X}\mathrm{t}\text{=}f\text{(}\mathrm{T}\text{)}\\ \mathrm{Y}\mathrm{t}\text{=}f\text{(}\mathrm{T}\text{)}\end{array}$ form)	[Param]

The function type you choose is applied to the function you are about to input. It does not affect any function that has already been entered.

4. Highlight the line where you want to input a function, and then input it.

Press X to input the variables ($x$, $\theta$, $\mathrm{T}$) in accordance with the function type you chose.

Example 1:  To input the Cartesian coordinate type $y={\mathrm{A}x}^2-\mathrm{B}$

PX(A)Xi-Pe(B)E



Example 2:  To input the polar coordinate type $r=\mathrm{A}\sin \left(\theta \right)-\mathrm{B}$

PX(A)vX)-Pe(B)E



Example 3:  To input the parametric type $\{\begin{array}{c}\mathrm{X}\mathrm{t}＝\mathrm{A}\sin \text{(}\mathrm{T}\text{)}-\mathrm{B}\\ \mathrm{Y}\mathrm{t}＝\mathrm{A}\cos \text{(}\mathrm{T}\text{)}-\mathrm{B}\end{array}$

PX(A)vX)-Pe(B)E
PX(A)cX)-Pe(B)E

1. On the Function tab, highlight the line where you want to input.

2. Select T > [Built-In Function].

3. On the menu that appears, highlight the function you want to input and then press O.

You can input the functions listed below.

$y=\mathrm{A}x+\mathrm{B}$

$y=\mathrm{A}\text{(}x-\mathrm{B}{\text{)}}^2+\mathrm{C}$

$y=\mathrm{A}{x}^2+\mathrm{B}x+\mathrm{C}$

$y=\mathrm{A}{x}^3+\mathrm{B}{x}^2+\mathrm{C}x+\mathrm{D}$

$y=\mathrm{A}\sin \text{(}\mathrm{B}x+\mathrm{C}\text{)}$

$y=\mathrm{A}\cos \text{(}\mathrm{B}x+\mathrm{C}\text{)}$

$y=\mathrm{A}\tan \text{(}\mathrm{B}x+\mathrm{C}\text{)}$

To edit or delete an existing function, use the same operation as one in the Graph&Table app. See To edit a function and To delete a function for more information.

1. On the Function tab, highlight the function you want to change the line color of the graph.

2. Select T > [Line Color].

3. Use the list that appears to select a color.

1. On the Function tab, highlight a line that contains an input function.

2. Press T.

This displays a Tools menu with [Select] highlighted.

3. Change [Select] to (On) to enable or to (Off) to disable graphing for the selected function.

4. Press b to close the Tools menu.

The on/off setting of step 3 is indicated by the icons to the left of each line of the Function tab.

… On

… Off

You can use the Setup tab to configure the settings described below, which appear when you press T.

The Settings menu items described below are specific to the Dyna Graph app.

S > [Looping]: Specifies whether graphing should end automatically or continue once started.

S > [Locus]: Specify whether or not to display the graph locus.

S > [Processing Speed]: Speeds up drawing by thinning out the graph dots.