3-3-5

Storing Functions

Using Built-in Functions

Your ClassPad is pre-programmed with the commonly used functions listed below. You can recall a built-in function, save it to an Graph Editor sheet, assign values to its coefficients, and graph the results.

y = a·x + b

y = a·x^2 + b·x + c

y = a·x^3 + b·x^2 + c·x + d y = a·sin (b·x + c) + d

y= a·cos (b·x + c) + d y = a·tan (b·x + c) + d y = a·log (b·x + c) + d y = a·ln (b·x + c) + d y = a·e^(b·x + c) + d y = a^(b·x + c) + d

y = a /(b·x + c) + d

u ClassPad Operation

(1)On the application menu, tap T.

(2)On the Graph Editor window, select the sheet and the line where you want to store the built-in function.

(3)Tap aand then [Built-In].

(4)On the menu that appears, tap the built-in function you want to select.

•This displays a dialog box for assigning values to the coefficients. The actual coefficients that appear (a through d) depend on the built-in function you selected.

(5)Assign values to each coefficient.

(6)Tap [OK].

Saving the Message Box Expression to the Graph Editor Window

You can save the expression currently displayed in the Graph window message box to the Graph Editor window. This capability comes in handy when you want to save an expression that appears in the message box while you are using the sketch function (see “3-6 Using the Sketch Menu”).

Note

•The following are the steps you should perform after an expression is stored in the message box of the Graph window.

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